Climate Comfort Score
77/100
Good
NOAA 1991–2020 normals Station-mapped location · no exact Census place match 71°F annual avg Public-domain federal data
Casa Grande National Monument, AZ Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 71°F
- Avg annual temp
- 77/100
- Comfort score
- 8.3"
- Annual precip
- 285d
- Growing season
30-year climate normals (1991-2020) from Casa Grande National Monument's primary NOAA station, CASA GRANDE NM.
The climate verdict for Casa Grande National Monument
Casa Grande National Monument, Arizona is cooling-led and dry. Its 8.3 inches of annual precipitation pairs with an annual average of 71°F. It scores 77/100 for composite comfort (good), putting it in the most temperate third of station-mapped US locations, milder than 70% of them.
- 71°F
- yearly average temperature, NOAA normal
- 77/100
- comfort score, milder than 70% of station-mapped locations
- 8.3"
- annual precipitation
- 285 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
71°F (22°C)
Avg High
88°F
Avg Low
55°F
Annual Precip
8.3"
Annual Snow
0.0"
Comfort Score
77/100
Good
Avg Annual Temperature
71°F
30-year mean (NOAA NCEI)
Annual Precipitation
8.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Casa Grande National Monument) 77.0%
National median (64)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Casa Grande National Monument area.
How Casa Grande National Monument compares with its closest stations
Against the 6 closest stations in the record, Casa Grande National Monument averages 71°F a year, warmer than Arizona City, AZ (69°F), and cooler than Florence, AZ (72°F) and Casa Grande, AZ (72°F). On comfort score it places 3 of 6 in that local group.
Corpus-relative placement
Where Casa Grande National Monument sits across the climate record
These comparisons place this primary-station normal among station-mapped locations with the same NOAA 1991–2020 fields.
- Annual temperature
- Warmer than 96%
- of 6,861 measured location normals.
- Annual precipitation
- Wetter than 3%
- of 6,352 measured location normals.
- Seasonal temperature swing
- Larger than 36%
- of 6,861 complete location-year normals.
How Casa Grande National Monument compares across U.S. station-mapped locations
Casa Grande National Monument's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
77 Top 30% milder than 70% of 6,189 station-mapped locations
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Casa Grande National Monument's measured station temperature trend
MethodologyAcross 44 complete annual observations from 1949 to 2024, CASA GRANDE NM warmed at a fitted rate of 0.24°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Casa Grande National Monument primary station fitted change +0.24 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 68°F (20°C) | 37°F (3°C) | 52°F (11°C) | 1.0" | 0.0" | 9.5 | 0.0 |
| February | 71°F (22°C) | 40°F (4°C) | 56°F (13°C) | 1.0" | 0.0" | 4.9 | 0.0 |
| March | 78°F (26°C) | 45°F (7°C) | 62°F (17°C) | 0.9" | 0.0" | 1.0 | 2.8 |
| April | 86°F (30°C) | 51°F (10°C) | 69°F (20°C) | 0.3" | 0.0" | 0.1 | 12.3 |
| May | 95°F (35°C) | 59°F (15°C) | 77°F (25°C) | 0.2" | 0.0" | 0.0 | 24.9 |
| June | 105°F (41°C) | 68°F (20°C) | 87°F (30°C) | 0.1" | 0.0" | 0.0 | 29.5 |
| July | 107°F (41°C) | 77°F (25°C) | 92°F (33°C) | 1.1" | 0.0" | 0.0 | 30.7 |
| August | 105°F (41°C) | 77°F (25°C) | 91°F (33°C) | 1.2" | 0.0" | 0.0 | 30.4 |
| September | 101°F (38°C) | 70°F (21°C) | 85°F (30°C) | 0.7" | 0.0" | 0.0 | 28.8 |
| October | 91°F (33°C) | 56°F (13°C) | 73°F (23°C) | 0.5" | 0.0" | 0.1 | 18.4 |
| November | 78°F (25°C) | 44°F (7°C) | 61°F (16°C) | 0.5" | 0.0" | 2.4 | 1.9 |
| December | 67°F (19°C) | 36°F (2°C) | 52°F (11°C) | 0.8" | 0.0" | 11.1 | 0.0 |
The year, day by day
The year in Casa Grande National Monument runs from a mild 36°F around December 17 to 107°F at the peak near June 30, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from May 1 through October 17, covering 170 dates. The broader mild season, normal highs of 70°F or more, runs February 5 to December 2.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 36°F around December 17.
Where the wet dates fall
The likeliest wet date is August 6, when 18% of years recorded at least a hundredth of an inch. The driest is June 7 at 3%. Summed across the calendar, that is about 37 wet dates a year.
The widest day
June 9 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Casa Grande National Monument.
Where Casa Grande National Monument Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 170 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Aridity defines the water calendar: about 8 inches in a normal year lands this among the driest tenth of ranked stations.
Standing computed against the distribution of 6,860 NOAA 1991–2020 normals stations in the PlainClimate database; only nationally notable standings are shown.
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.0"
4.4 days with precipitation
February 1.0"
4.2 days with precipitation
March 0.9"
3.2 days with precipitation
April 0.3"
1.4 days with precipitation
May 0.2"
1.3 days with precipitation
June 0.1"
0.6 days with precipitation
July 1.1"
4.7 days with precipitation
August 1.2"
5.3 days with precipitation
September 0.7"
3.3 days with precipitation
October 0.5"
2.2 days with precipitation
November 0.5"
2.0 days with precipitation
December 0.8"
4.2 days with precipitation
Casa Grande National Monument spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 34%, with neither reaching the 35% that would mark a distinct wet season. Casa Grande National Monument has no dry season to plan around, though it does carry a 40.2°F seasonal spread.
The gap between the wettest and driest month still matters: August averages 1.2" and June 0.1". The three wettest months together take 41% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Casa Grande National Monument's precipitation splits across the calendar
About 37 days a year record measurable precipitation here, carrying 8.3" between them, or roughly 0.22 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
Wet days a year
37
Wettest month by days
August
Driest month by days
June
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Casa Grande National Monument's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
November 29
50% probability date
Last Spring Freeze
February 17
50% probability date
Growing Season
285 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,452
Higher = more heating needed
Cooling Degree Days
3,778
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Places with a similar climate profile
NOAA 1991–2020 annual normals connect this location to non-geographic peers. Temperature peers use annual mean temperature; energy peers use both heating and cooling degree days.
Closest annual-temperature peers
What Casa Grande National Monument's climate means for you
Casa Grande National Monument runs 71°F a year - peaking in July, coldest in December.
- A long growing window of about 285 frost-free days, with the last spring freeze around February 17, leaves room for successive plantings.
- Both loads matter across the year, 1,452 heating and 3,778 cooling degree days, so shoulder-season efficiency pays here.
- See how Casa Grande National Monument lines up against the rest of Arizona and the national rankings. See rankings
Climate Guides
Data-derived climate profile
How Casa Grande National Monument's climate pattern fits together
cooling led · dry · mid swing
Air-conditioning demand is the clearest thermal signal here. Casa Grande National Monument accumulates 3,778 cooling degree days, more than twice its 1,452 heating total; the monthly table shows when that imbalance builds rather than treating it as a year-round condition.
Heat demand sits beside limited local precipitation: Casa Grande National Monument receives 8.3 inches in a normal year, inside PlainClimate's dry range. Recorded annual snowfall is negligible. Month-level precipitation is the useful check on when that small annual total arrives.
July and December mark the typical warm and cold ends of the calendar in Casa Grande National Monument's middle-range seasonal profile. The measured spread is 40.2°F. The annual average is 71°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Casa Grande National Monument has a long frost-free window of roughly 285 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
These labels group NOAA 1991-2020 normals from Casa Grande National Monument's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. They are descriptive ranges, not an official NOAA classification or a forecast for any specific year.
The year in four calendar signals
- Warmest normal
- July
- At 92°F (33°C) this is a genuinely hot month, in the top third of US stations, and the daily average understates afternoon highs.
- Coldest normal
- December
- The coldest month still averages 52°F (11°C), above freezing, so this calendar has no hard winter.
- Rainfall rhythm
- August to June
- August is typically wettest; June is driest.
- Mild-temperature window
- February through November
- Monthly means sit between 55°F and 75°F in this window. Freezing days are still reported from January through December.
Frequently Asked Questions
What is the average temperature in Casa Grande National Monument, AZ? ▼
The average annual temperature in Casa Grande National Monument, Arizona is 71°F. The warmest month averages 107°F (41°C) and the coldest averages 36°F (2°C).
How dry is Casa Grande National Monument? ▼
Casa Grande National Monument receives 8.3 inches of precipitation a year, spread across roughly 37 days that record any measurable amount. For reference, the contiguous United States averages near 30 inches. Based on NOAA 30-year climate normals (1991-2020).
How many days above 90°F does Casa Grande National Monument get? ▼
Casa Grande National Monument averages about 180 days a year at or above 90°F, concentrated in July and the months either side of it. That is a count of days reaching the threshold, not a measure of how far above it they go.
What is the comfort score for Casa Grande National Monument? ▼
Casa Grande National Monument has a climate comfort score of 77/100 (Good), milder than 70% of station-mapped locations in the PlainClimate database.
When is the growing season in Casa Grande National Monument? ▼
Casa Grande National Monument has approximately 285 frost-free days per year, with the last spring freeze around February 17 and the first fall freeze around November 29.
How much energy does heating and cooling require in Casa Grande National Monument? ▼
Casa Grande National Monument has 1,452 heating degree days and 3,778 cooling degree days annually, a cooling-dominated climate. See our <a href="/guides/reading-weather-data" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Casa Grande National Monument climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020). Figures on this page come from Casa Grande National Monument's primary NOAA station (CASA GRANDE NM, USC00021314).
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Casa Grande National Monument's primary station: CASA GRANDE NM (USC00021314). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. The reproducible method is an exact normalized name-and-state match; unresolved is an upper bound on facilities because spelling variants can be missed.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.