Climate Comfort Score
80/100
Excellent
NOAA 1991–2020 normals 72°F annual avg Public-domain federal data
Casa Grande, AZ Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 72°F
- Avg annual temp
- 80/100
- Comfort score
- 7.9"
- Annual precip
- 304d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Casa Grande
Casa Grande, Arizona averages 72°F a year and scores 80/100 on the comfort index - excellent, milder than 82% of U.S. cities.
- 72°F
- annual average temperature (NOAA normal)
- 80/100
- comfort score, milder than 82% of U.S. cities
- 7.9"
- yearly precipitation total
- 304 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
72°F (22°C)
Avg High
88°F
Avg Low
57°F
Annual Precip
7.9"
Annual Snow
0.0"
Comfort Score
80/100
Excellent
Avg Annual Temperature
72°F
30-year mean (NOAA NCEI)
Annual Precipitation
7.9"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Casa Grande) 80.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Casa Grande area.
How Casa Grande compares to every U.S. city
Casa Grande's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
80 Top 18% higher than 82% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Casa Grande
MethodologyCasa Grande's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 69°F (20°C) | 39°F (4°C) | 54°F (12°C) | 0.8" | 0.0" | 5.0 | 0.0 |
| February | 73°F (23°C) | 42°F (5°C) | 57°F (14°C) | 1.0" | 0.0" | 2.4 | 0.0 |
| March | 80°F (27°C) | 47°F (8°C) | 64°F (18°C) | 0.8" | 0.0" | 0.4 | 3.4 |
| April | 88°F (31°C) | 53°F (12°C) | 70°F (21°C) | 0.2" | 0.0" | 0.0 | 12.1 |
| May | 96°F (36°C) | 60°F (16°C) | 78°F (26°C) | 0.2" | 0.0" | 0.0 | 26.3 |
| June | 106°F (41°C) | 70°F (21°C) | 88°F (31°C) | 0.2" | 0.0" | 0.0 | 29.7 |
| July | 107°F (42°C) | 78°F (26°C) | 93°F (34°C) | 0.9" | 0.0" | 0.0 | 30.9 |
| August | 105°F (41°C) | 77°F (25°C) | 91°F (33°C) | 1.5" | 0.0" | 0.0 | 30.8 |
| September | 100°F (38°C) | 71°F (22°C) | 86°F (30°C) | 0.7" | 0.0" | 0.0 | 29.5 |
| October | 91°F (33°C) | 57°F (14°C) | 74°F (23°C) | 0.5" | 0.0" | 0.1 | 18.8 |
| November | 78°F (25°C) | 45°F (7°C) | 61°F (16°C) | 0.4" | 0.0" | 1.5 | 2.3 |
| December | 68°F (20°C) | 38°F (4°C) | 53°F (12°C) | 0.7" | 0.0" | 7.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.8"
3.5 days with precipitation
February 1.0"
3.9 days with precipitation
March 0.8"
3.3 days with precipitation
April 0.2"
1.2 days with precipitation
May 0.2"
1.3 days with precipitation
June 0.2"
0.7 days with precipitation
July 0.9"
2.9 days with precipitation
August 1.5"
4.5 days with precipitation
September 0.7"
2.5 days with precipitation
October 0.5"
1.9 days with precipitation
November 0.4"
1.9 days with precipitation
December 0.7"
3.8 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 6
50% probability date
Last Spring Freeze
February 5
50% probability date
Growing Season
304 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,241
Higher = more heating needed
Cooling Degree Days
3,963
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Casa Grande's climate means for you
Casa Grande runs 72°F a year - peaking in July, coldest in December.
- Gardeners get about 304 frost-free days, with the last spring freeze near February 5 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,241 heating and 3,963 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Casa Grande, AZ
The NOAA 1991–2020 climate normals describe Casa Grande, Arizona as a location with an annual average temperature of 72°F, ranging from a mean daily high of 88°F to a mean daily low of 57°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00021306, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Casa Grande averages 7.9 inches of precipitation annually, with negligible snowfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 304 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 5 and the first fall freeze near December 6. Turning to energy use, 1,241 heating degree days and 3,963 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Casa Grande scores 80/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and December-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Casa Grande, AZ? ▼
The average annual temperature in Casa Grande, Arizona is 72°F. The warmest month averages 107°F (42°C) and the coldest averages 38°F (4°C).
How much rain does Casa Grande get? ▼
Casa Grande receives 7.9 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Casa Grande? ▼
Casa Grande has a climate comfort score of 80/100 (Excellent), milder than 82% of U.S. cities in the PlainClimate database.
When is the growing season in Casa Grande? ▼
Casa Grande has approximately 304 frost-free days per year, with the last spring freeze around February 5 and the first fall freeze around December 6.
How much energy does heating and cooling require in Casa Grande? ▼
Casa Grande has 1,241 heating degree days and 3,963 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 climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00021306 near Casa Grande.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00021306. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.