Organ Pipe Cactus National Monument, Arizona climate: Climate normals at a NOAA weather station
Organ Pipe Cactus National Monument's normal year runs from 41°F December nights to 104°F July afternoons, with 9.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 22.2°C, December lows of 5°C, July highs of 40°C, 236 mm of precipitation a year.
- NOAA stationOrgan Pipe Cactus National Monument
- Station IDUSC00026132
- Location31.96°N 112.80°W
- Elevation1,678 ft (512 m)
On October 23, the normal high in Organ Pipe Cactus National Monument is 88°F and the normal low 56°F, and the chance of measurable rain or snow is 6%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Organ Pipe Cactus National Monument.
- Jan 71° 41°
- Feb 73° 43°
- Mar 79° 47°
- Apr 86° 52°
- May 93° 59°
- Jun 102° 68°
- Jul 104° 76°
- Aug 103° 75°
- Sep 99° 70°
- Oct 90° 59°
- Nov 79° 48°
- Dec 70° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Organ Pipe Cactus National Monument each month?
July is the warmest month, with normal highs of 104°F; December the coldest, with normal lows of 41°F. The most precipitation falls in August (1.82 in), the least in June (0.11 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 71°F | 41°F | 56.0°F | 0.99 | 3 | <1 | 3 | 10 h 20 min |
| February | 73°F | 43°F | 57.9°F | 0.89 | 4 | <1 | 2 | 11 h |
| March | 79°F | 47°F | 63.3°F | 0.78 | 3 | 3 | <1 | 12 h |
| April | 86°F | 52°F | 68.8°F | 0.31 | 1 | 10 | <1 | 13 h |
| May | 93°F | 59°F | 76.3°F | 0.18 | 1 | 22 | <1 | 13 h 50 min |
| June | 102°F | 68°F | 84.8°F | 0.11 | 1 | 29 | <1 | 14 h 10 min |
| July | 104°F | 76°F | 89.7°F | 1.32 | 4 | 31 | <1 | 14 h |
| August | 103°F | 75°F | 89.3°F | 1.82 | 6 | 31 | <1 | 13 h 20 min |
| September | 99°F | 70°F | 84.5°F | 0.75 | 3 | 29 | <1 | 12 h 20 min |
| October | 90°F | 59°F | 74.3°F | 0.56 | 2 | 17 | <1 | 11 h 30 min |
| November | 79°F | 48°F | 63.4°F | 0.44 | 2 | 3 | <1 | 10 h 30 min |
| December | 70°F | 41°F | 55.4°F | 1.13 | 4 | <1 | 3 | 10 h |
| Year (annual) | 87°F | 57°F | 72.0°F | 9.28 | 33 | 175 | 8 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 22°C | 5°C | 13.3°C | 25 mm |
| February | 23°C | 6°C | 14.4°C | 23 mm |
| March | 26°C | 8°C | 17.4°C | 20 mm |
| April | 30°C | 11°C | 20.4°C | 8 mm |
| May | 34°C | 15°C | 24.6°C | 5 mm |
| June | 39°C | 20°C | 29.3°C | 3 mm |
| July | 40°C | 24°C | 32.1°C | 34 mm |
| August | 40°C | 24°C | 31.8°C | 46 mm |
| September | 37°C | 21°C | 29.2°C | 19 mm |
| October | 32°C | 15°C | 23.5°C | 14 mm |
| November | 26°C | 9°C | 17.4°C | 11 mm |
| December | 21°C | 5°C | 13.0°C | 29 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00026132; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Organ Pipe Cactus National Monument?
Normal highs sit between 65°F and 85°F in January, February, March, November and December. Of those, November has the fewest days with rain (2).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00026132.
When is the last frost at Organ Pipe Cactus National Monument?
In Organ Pipe Cactus National Monument, the last spring frost (32°F) comes after February 4 in half of years and after March 3 in one year in ten; the first autumn frost comes before December 15 in half of years and before November 26 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 41 year in 10 after March 3; 9 in 10 after December 31
- First autumn frost, half of years before
- December 151 year in 10 before November 26; 9 in 10 before January 9
NOAA puts the median frost-free season at 314 days, and the season without a hard freeze (28°F) at 361 days.
A hard freeze (28°F) comes after January 18 in half of springs and before January 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Organ Pipe Cactus National Monument in zone 9b in ZIP code 85341, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9b: the coldest night of a typical year reaches 27°F (19 complete years).
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00026132; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Organ Pipe Cactus National Monument?
In a normal year in Organ Pipe Cactus National Monument, 175 days a year reach 90°F (97 of them 100°F or more), 8 nights fall to 32°F or colder and 33 days bring measurable precipitation.
- Days at 90°F or more
- 175a normal year
- Days at 100°F or more
- 97a normal year
- Nights at 32°F or colder
- 8a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 33a normal year
The highest temperature in this station's record (since 1944) is 118°F, on June 26, 1990; the lowest is 14°F, on January 12, 1962.
The wettest calendar year on that record is 1992, with 17.62 in; the snowiest season is 1960–61, with 1.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00026132; records: ACIS (NOAA Regional Climate Centers), station USC00026132. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Organ Pipe Cactus National Monument?
Over a year 93% of the sunlight that would reach the ground under clear skies gets through the clouds at Organ Pipe Cactus National Monument, 6.0 kWh per square metre a day. June is the sunniest month (97%) and December the cloudiest (88%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 89% | 3.8 |
| February | 88% | 4.7 |
| March | 92% | 6.2 |
| April | 95% | 7.5 |
| May | 97% | 8.3 |
| June | 97% | 8.4 |
| July | 90% | 7.3 |
| August | 92% | 6.9 |
| September | 93% | 6.2 |
| October | 94% | 5.3 |
| November | 91% | 4.0 |
| December | 88% | 3.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Organ Pipe Cactus National Monument record?
A normal year at Organ Pipe Cactus National Monument brings 1,055 heating degree days, 80% fewer than the median U.S. place (5,373), and 3,630 cooling degree days, 4.0 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 8,091 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 280 | 3 |
| February | 207 | 9 |
| March | 111 | 57 |
| April | 33 | 148 |
| May | 4 | 354 |
| June | 0 | 594 |
| July | 0 | 766 |
| August | 0 | 752 |
| September | 0 | 585 |
| October | 11 | 297 |
| November | 112 | 64 |
| December | 299 | 2 |
| Year (annual) | 1,055 | 3,630 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00026132. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Organ Pipe Cactus National Monument been warmer than normal?
2023 averaged 72.2°F, 0.2°F above the 1991-2020 normal of 72.0°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 72.2°F | +0.2°F | 9.22 |
Over 48 complete years from 1949 to 2023, the station's annual mean temperature rose at a fitted 5.2°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00026132; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Organ Pipe Cactus National Monument's climate compare?
Organ Pipe Cactus National Monument is warmer than 78 of the 97 places with their own NOAA record in Arizona, and wetter than 35. Across the 7,247 U.S. stations with normals, its annual mean of 72.0°F is warmer than 97%.
In the Köppen classification computed from these normals, Organ Pipe Cactus National Monument is BWh: hot desert. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Organ Pipe Cactus National Monument share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Pisinemo, AZ357 people · 29 mi E
- Ali Chuk, AZ123 people · 17 mi SE
- Wahak Hotrontk, AZ82 people · 30 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Organ Pipe Cactus National Monument's climate
What is the coldest month at Organ Pipe Cactus National Monument?
December, with a normal high of 70°F and a normal low of 41°F. The warmest is July (104°F by day, 76°F at night).
Does it snow at Organ Pipe Cactus National Monument?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Organ Pipe Cactus National Monument?
August, with 1.82 in of precipitation in a normal year; the driest is June with 0.11 in.
What plant hardiness zone is Organ Pipe Cactus National Monument in?
The USDA's 2023 map puts Organ Pipe Cactus National Monument in zone 9b in ZIP code 85341, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 27°F (19 years, 1991-2020): zone 9b.
How late can frost come at Organ Pipe Cactus National Monument?
In half of years the last 32°F night comes after February 4; in one year in ten it comes after March 3. Waiting until March 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- Ajo, AZ29 miles from this station, 73.5°F a year
- Gila Bend, AZ68 miles from this station, 74.7°F a year
- Kitt Peak, AZ70 miles from this station, 55.7°F a year
- Painted Rock Dam, AZ79 miles from this station, 74.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made