Wittmann, Arizona climate: Normal weather by month, frost dates and records
Wittmann's normal year runs from 39°F December nights to 105°F July afternoons, with 9.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 21.2°C, December lows of 4°C, July highs of 40°C, 244 mm of precipitation a year.
- NOAA stationWittmann (1 mi SE)
- Station IDUSC00029464
- Location33.78°N 112.52°W
- Elevation1,683 ft (513 m)
- Population (census place)606
On October 23, the normal high in Wittmann is 84°F and the normal low 54°F, and the chance of measurable rain or snow is 7%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Wittmann.
- Jan 65° 39°
- Feb 68° 41°
- Mar 75° 46°
- Apr 82° 51°
- May 92° 60°
- Jun 102° 69°
- Jul 105° 77°
- Aug 103° 77°
- Sep 98° 70°
- Oct 87° 57°
- Nov 74° 46°
- Dec 64° 39°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Wittmann each month?
July is the warmest month, with normal highs of 105°F; December the coldest, with normal lows of 39°F. The most precipitation falls in February (1.45 in), the least in June (0.07 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 65°F | 39°F | 52.2°F | 1.38 | 4 | <1 | 4 | 10 h 10 min |
| February | 68°F | 41°F | 54.8°F | 1.45 | 4 | <1 | 3 | 11 h |
| March | 75°F | 46°F | 60.3°F | 1.00 | 3 | 1 | <1 | 11 h 50 min |
| April | 82°F | 51°F | 66.3°F | 0.25 | 1 | 7 | <1 | 13 h |
| May | 92°F | 60°F | 75.9°F | 0.09 | 1 | 20 | <1 | 13 h 50 min |
| June | 102°F | 69°F | 85.5°F | 0.07 | <1 | 29 | <1 | 14 h 20 min |
| July | 105°F | 77°F | 90.7°F | 0.89 | 5 | 31 | <1 | 14 h 10 min |
| August | 103°F | 77°F | 90.1°F | 1.13 | 5 | 31 | <1 | 13 h 30 min |
| September | 98°F | 70°F | 83.7°F | 1.06 | 3 | 26 | <1 | 12 h 30 min |
| October | 87°F | 57°F | 71.8°F | 0.66 | 2 | 11 | <1 | 11 h 20 min |
| November | 74°F | 46°F | 59.9°F | 0.67 | 2 | 1 | 1 | 10 h 30 min |
| December | 64°F | 39°F | 51.5°F | 0.95 | 4 | <1 | 5 | 10 h |
| Year (annual) | 85°F | 56°F | 70.2°F | 9.60 | 36 | 157 | 13 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 18°C | 4°C | 11.2°C | 35 mm |
| February | 20°C | 5°C | 12.7°C | 37 mm |
| March | 24°C | 8°C | 15.7°C | 25 mm |
| April | 28°C | 10°C | 19.1°C | 6 mm |
| May | 33°C | 16°C | 24.4°C | 2 mm |
| June | 39°C | 21°C | 29.7°C | 2 mm |
| July | 40°C | 25°C | 32.6°C | 23 mm |
| August | 40°C | 25°C | 32.3°C | 29 mm |
| September | 36°C | 21°C | 28.7°C | 27 mm |
| October | 30°C | 14°C | 22.1°C | 17 mm |
| November | 23°C | 8°C | 15.5°C | 17 mm |
| December | 18°C | 4°C | 10.8°C | 24 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00029464; 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.
When is the best weather to visit Wittmann?
Normal highs sit between 65°F and 85°F in January, February, March, April and November. Of those, April has the fewest days with rain (1).
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 USC00029464.
When is the last frost in Wittmann?
In Wittmann, the last spring frost (32°F) comes after February 5 in half of years and after March 3 in one year in ten; the first autumn frost comes before December 11 in half of years and before November 20 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 51 year in 10 after March 3; 9 in 10 after January 6
- First autumn frost, half of years before
- December 111 year in 10 before November 20; 9 in 10 before January 2
NOAA puts the median frost-free season at 306 days, and the season without a hard freeze (28°F) at 345 days.
A hard freeze (28°F) comes after January 15 in half of springs and before December 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Wittmann in zone 9b in ZIP code 85361, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Wittmann's NOAA station is in zone 9a: the coldest night of a typical year reaches 24°F (18 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00029464; 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 in Wittmann?
In a normal year in Wittmann, 157 days a year reach 90°F (92 of them 100°F or more), 13 nights fall to 32°F or colder and 36 days bring measurable precipitation.
- Days at 90°F or more
- 157a normal year
- Days at 100°F or more
- 92a normal year
- Nights at 32°F or colder
- 13a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 36a normal year
The highest temperature in this station's record (since 1930) is 119°F, on June 28, 2013; the lowest is 12°F, on January 13, 1963.
The wettest calendar year on that record is 1941, with 19.35 in; the snowiest season is 1965–66, with 1.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00029464; records: ACIS (NOAA Regional Climate Centers), station USC00029464. Records use complete months only; a month missing more than three days is left out.
How sunny is Wittmann?
Over a year 92% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Wittmann, 5.8 kWh per square metre a day. June is the sunniest month (97%) and December the cloudiest (86%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 87% | 3.4 |
| February | 87% | 4.4 |
| March | 90% | 5.9 |
| April | 93% | 7.3 |
| May | 96% | 8.2 |
| June | 97% | 8.5 |
| July | 92% | 7.5 |
| August | 93% | 6.9 |
| September | 94% | 6.2 |
| October | 94% | 5.0 |
| November | 91% | 3.8 |
| December | 86% | 3.1 |
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 much heating and cooling does Wittmann need?
A normal year in Wittmann brings 1,533 heating degree days, 71% fewer than the median U.S. place (5,373), and 3,471 cooling degree days, 3.8 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,546 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 397 | 0 |
| February | 287 | 1 |
| March | 171 | 24 |
| April | 59 | 100 |
| May | 6 | 343 |
| June | 0 | 613 |
| July | 0 | 797 |
| August | 0 | 778 |
| September | 0 | 561 |
| October | 18 | 229 |
| November | 178 | 26 |
| December | 417 | 0 |
| Year (annual) | 1,533 | 3,471 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00029464. 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.
How does Wittmann's climate compare?
Wittmann is warmer than 65 of the other 96 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 70.2°F is warmer than 95%.
In the Köppen classification computed from these normals, Wittmann 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 Wittmann share this climate record?
4 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.
- Peoria, AZalso near: Youngtown (13 mi, 71.9°F a year); Castle Hot Springs (14 mi, 72.6°F a year)199,924 people · 12 mi E
- Surprise, AZalso near: Youngtown (10 mi, 71.9°F a year); Litchfield Park (13 mi, 73.3°F a year)167,564 people · 8 mi SE
- Circle City, AZ857 people · 4 mi NW
- Morristown, AZ194 people · 7 mi NW
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 Wittmann's climate
What is the coldest month in Wittmann?
December, with a normal high of 64°F and a normal low of 39°F. The warmest is July (105°F by day, 77°F at night).
Does it snow in Wittmann?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Wittmann?
February, with 1.45 in of precipitation in a normal year; the driest is June with 0.07 in.
What plant hardiness zone is Wittmann in?
The USDA's 2023 map puts Wittmann in zone 9b in ZIP code 85361, the nearest ZIP area. By the same method at Wittmann's NOAA station, the coldest night of a typical year reaches 24°F (18 years, 1991-2020): zone 9a.
How late can frost come in Wittmann?
In half of years the last 32°F night comes after February 5; 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
- Castle Hot Springs, AZ17 miles from this station, 72.6°F a year
- Youngtown, AZ18 miles from this station, 71.9°F a year
- Wickenburg, AZ19 miles from this station, 67.2°F a year
- Litchfield Park, AZ21 miles from this station, 73.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made