Williams (35 mi NNW), Arizona climate: Climate normals at a NOAA weather station
Williams (35 mi NNW)'s normal year runs from 22°F December nights to 88°F July afternoons, with 12.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.1°C, December lows of −6°C, July highs of 31°C, 304 mm of precipitation a year.
- NOAA stationWilliams (35 mi NNW)
- Station IDUSW00053155
- Location35.76°N 112.34°W
- Elevation5,990 ft (1,826 m)
On October 14, the normal high in Williams (35 mi NNW) is 69°F and the normal low 39°F, and the chance of measurable rain or snow is 12%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Williams (35 mi NNW).
- Jan 45° 23°
- Feb 49° 25°
- Mar 58° 29°
- Apr 64° 34°
- May 73° 41°
- Jun 85° 50°
- Jul 88° 57°
- Aug 85° 56°
- Sep 79° 49°
- Oct 68° 39°
- Nov 56° 29°
- Dec 44° 22°
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 Williams (35 mi NNW) each month?
July is the warmest month, with normal highs of 88°F; December the coldest, with normal lows of 22°F. The most precipitation falls in August (2.02 in), the least in June (0.25 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 45°F | 23°F | 33.9°F | 1.10 | 6 | <1 | 29 | 10 h |
| February | 49°F | 25°F | 36.7°F | 1.12 | 6 | <1 | 25 | 10 h 50 min |
| March | 58°F | 29°F | 43.2°F | 0.96 | 4 | <1 | 21 | 11 h 50 min |
| April | 64°F | 34°F | 48.9°F | 0.51 | 3 | <1 | 12 | 13 h |
| May | 73°F | 41°F | 57.0°F | 0.57 | 4 | <1 | 3 | 14 h |
| June | 85°F | 50°F | 67.2°F | 0.25 | 1 | 10 | <1 | 14 h 30 min |
| July | 88°F | 57°F | 72.4°F | 1.95 | 10 | 12 | <1 | 14 h 20 min |
| August | 85°F | 56°F | 70.4°F | 2.02 | 8 | 7 | <1 | 13 h 30 min |
| September | 79°F | 49°F | 63.9°F | 1.24 | 5 | 1 | <1 | 12 h 30 min |
| October | 68°F | 39°F | 53.3°F | 1.02 | 4 | <1 | 6 | 11 h 20 min |
| November | 56°F | 29°F | 42.4°F | 0.58 | 3 | <1 | 20 | 10 h 20 min |
| December | 44°F | 22°F | 33.0°F | 0.65 | 6 | <1 | 29 | 9 h 50 min |
| Year (annual) | 66°F | 38°F | 51.9°F | 11.97 | 60 | 30 | 144 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 7°C | −5°C | 1.1°C | 28 mm |
| February | 9°C | −4°C | 2.6°C | 28 mm |
| March | 14°C | −2°C | 6.2°C | 24 mm |
| April | 18°C | 1°C | 9.4°C | 13 mm |
| May | 23°C | 5°C | 13.9°C | 14 mm |
| June | 29°C | 10°C | 19.6°C | 6 mm |
| July | 31°C | 14°C | 22.4°C | 50 mm |
| August | 29°C | 13°C | 21.3°C | 51 mm |
| September | 26°C | 9°C | 17.7°C | 31 mm |
| October | 20°C | 4°C | 11.8°C | 26 mm |
| November | 13°C | −2°C | 5.8°C | 15 mm |
| December | 7°C | −6°C | 0.6°C | 17 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Grand Canyon National Park 2 (23 miles away), gets 43 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00053155; 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 Williams (35 mi NNW)?
Normal highs sit between 65°F and 85°F in May, June, August, September and October. Of those, June 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 USW00053155.
When is the last frost at Williams (35 mi NNW)?
In Williams (35 mi NNW), the last spring frost (32°F) comes after May 9 in half of years and after May 27 in one year in ten; the first autumn frost comes before October 19 in half of years and before October 3 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
- May 91 year in 10 after May 27; 9 in 10 after April 24
- First autumn frost, half of years before
- October 191 year in 10 before October 3; 9 in 10 before November 3
NOAA puts the median frost-free season at 161 days, and the season without a hard freeze (28°F) at 188 days.
A hard freeze (28°F) comes after April 24 in half of springs and before October 31 in half of autumns.
Frost dates for every NOAA station in Arizona · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00053155. 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 Williams (35 mi NNW)?
In a normal year in Williams (35 mi NNW), 30 days a year reach 90°F, 144 nights fall to 32°F or colder and 60 days bring measurable precipitation.
- Days at 90°F or more
- 30a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 144a normal year
- Days that stay below freezing
- 9high of 32°F or less
- Days with 0.01 inch of precipitation
- 60a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00053155.
How sunny is it at Williams (35 mi NNW)?
Over a year 86% of the sunlight that would reach the ground under clear skies gets through the clouds at Williams (35 mi NNW), 5.5 kWh per square metre a day. June is the sunniest month (93%) and December the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 82% | 3.2 |
| February | 82% | 4.1 |
| March | 86% | 5.6 |
| April | 88% | 7.0 |
| May | 89% | 7.8 |
| June | 93% | 8.4 |
| July | 81% | 6.8 |
| August | 84% | 6.5 |
| September | 89% | 6.0 |
| October | 89% | 4.8 |
| November | 88% | 3.6 |
| December | 80% | 2.8 |
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 Williams (35 mi NNW) record?
A normal year at Williams (35 mi NNW) brings 5,334 heating degree days, 1% fewer than the median U.S. place (5,373), and 567 cooling degree days, 37% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,748 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 963 | 0 |
| February | 792 | 0 |
| March | 674 | 0 |
| April | 485 | 0 |
| May | 261 | 13 |
| June | 40 | 106 |
| July | 1 | 230 |
| August | 6 | 173 |
| September | 79 | 44 |
| October | 364 | 1 |
| November | 678 | 0 |
| December | 992 | 0 |
| Year (annual) | 5,334 | 567 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00053155. 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 Williams (35 mi NNW) been warmer than normal?
2025 averaged 54.0°F, 2.1°F above the 1991-2020 normal of 51.9°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.3°F | +1.4°F | 12.72 |
| 2022 | 52.3°F | +0.4°F | 10.98 |
| 2023 | 50.9°F | −1.0°F | 10.73 |
| 2024 | 53.6°F | +1.7°F | 9.32 |
| 2025 | 54.0°F | +2.1°F | 12.87 |
Source: observed years: ACIS, station USW00053155. A year counts only with all twelve months complete.
How does Williams (35 mi NNW)'s climate compare?
Williams (35 mi NNW) is warmer than 13 of the 97 places with their own NOAA record in Arizona, and wetter than 50. Across the 7,247 U.S. stations with normals, its annual mean of 51.9°F is warmer than 49%.
In the Köppen classification computed from these normals, Williams (35 mi NNW) is BSk: cold semi-arid steppe. 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 Williams (35 mi NNW) share this climate record?
Valle has no NOAA station with 1991-2020 normals of its 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.
- Valle, AZ403 people · 12 mi SE
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 Williams (35 mi NNW)'s climate
What is the coldest month at Williams (35 mi NNW)?
December, with a normal high of 44°F and a normal low of 22°F. The warmest is July (88°F by day, 57°F at night).
Does it snow at Williams (35 mi NNW)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Grand Canyon National Park 2 (23 miles away), records 43 inches of snow in a normal year.
What is the rainiest month at Williams (35 mi NNW)?
August, with 2.02 in of precipitation in a normal year; the driest is June with 0.25 in.
How late can frost come at Williams (35 mi NNW)?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 27. Waiting until May 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Arizona climateThe statewide normals and every place in the state
- Grand Canyon National Park Airport, AZ17 miles from this station, 46.7°F a year
- Grand Canyon National Park 2, AZ23 miles from this station, 48.1°F a year
- Grand Canyon Visitor Center, AZ25 miles from this station, 51.1°F a year
- Phantom Ranch, AZ28 miles from this station, 67.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made