Williams, AZ Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Williams's primary NOAA station, WILLIAMS 35 NNW - 2 stations mapped to the area.
The climate verdict for Williams
Dryness leads the climate profile for Williams, Arizona, with 12.0 inches of precipitation a year. NOAA records an annual average of 52°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 52°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 12.0"
- yearly precipitation total
- 163 days
- frost-free growing season
Williams: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00053155 · Williams, AZ 52°F mean · 12.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-MULTI · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,362
- PHOTO-FINISH ≈ Pilot Rock
- PRCP-ARID 12.0"
- SWING-MID 39°F
- COMF-LOW 52/100
- LOAD-HEAT 5,334 HDD
- STN-MULTI USW00053155
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Pilot Rock, OR (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every AZ station list.
- Williams (this station) 52°F
- Cold Whitman Mission, WA 52°F
- Hot Eltopia, WA 52°F
- Near Pilot Rock, OR 52°F
- Near Carson City, NV 52°F
Climate Living Index · Williams
Williams: 39/100 · grade F
Williams publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Williams, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 51.9°F · 15.6° from 67.5°F | 49/100 · D |
| Normal heat + freeze calendar | 153 calendar days | 44/100 · D |
| Frost-free season | 163 days/year | 36/100 · F |
| Precipitation balance | 12.0 in · 23.0 from 35 in | 18/100 · F |
Williams · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Williams's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 72.4°F
- Coldest month
- 33.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Williams sits across the climate record
Three NOAA fields for Williams's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 49th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 90%
- Williams's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 33rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Williams compares across U.S. station-mapped locations
Williams's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% of 6,189 station-mapped location scores
- 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%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 23°F (-5°C) | 34°F (1°C) | 1.1" | N/A | 28.9 | 0.0 |
| February | 49°F (9°C) | 25°F (-4°C) | 37°F (3°C) | 1.1" | N/A | 24.7 | 0.0 |
| March | 58°F (14°C) | 29°F (-2°C) | 43°F (6°C) | 1.0" | N/A | 21.1 | 0.0 |
| April | 64°F (18°C) | 34°F (1°C) | 49°F (9°C) | 0.5" | N/A | 12.2 | 0.0 |
| May | 73°F (23°C) | 41°F (5°C) | 57°F (14°C) | 0.6" | N/A | 3.2 | 0.1 |
| June | 85°F (29°C) | 50°F (10°C) | 67°F (20°C) | 0.3" | N/A | 0.1 | 9.6 |
| July | 88°F (31°C) | 57°F (14°C) | 72°F (22°C) | 1.9" | N/A | 0.0 | 12.2 |
| August | 85°F (29°C) | 56°F (13°C) | 70°F (21°C) | 2.0" | N/A | 0.0 | 7.2 |
| September | 79°F (26°C) | 49°F (9°C) | 64°F (18°C) | 1.2" | N/A | 0.2 | 1.1 |
| October | 68°F (20°C) | 39°F (4°C) | 53°F (12°C) | 1.0" | N/A | 5.6 | 0.0 |
| November | 56°F (13°C) | 29°F (-2°C) | 42°F (6°C) | 0.6" | N/A | 20.1 | 0.0 |
| December | 44°F (7°C) | 22°F (-6°C) | 33°F (1°C) | 0.7" | N/A | 28.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 88°F around July 4, short of 90°F on every date, while 153 dates carry a normal low at or below freezing, the coldest 21°F near December 18.
The freezing stretch
The normal low stays at or below 32°F into April 7, then returns to freezing around November 7, covering 153 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is July 22, when 30% of years recorded at least a hundredth of an inch. The driest is June 7 at 6%. Summed across the calendar, that is about 60 wet dates a year.
The widest day
June 11 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Williams.
Where Williams Stands Nationally
A drier-than-most normal water year — around 12 inches, below what four out of five ranked stations collect.
Daily temperature swings run wider than most of the country, peaking near 36°F between the normal high and low.
Williams earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
5.8 days with precipitation
6.1 days with precipitation
3.9 days with precipitation
3.1 days with precipitation
4.0 days with precipitation
1.2 days with precipitation
9.6 days with precipitation
8.4 days with precipitation
5.0 days with precipitation
3.8 days with precipitation
3.2 days with precipitation
6.1 days with precipitation
Williams runs a summer-peaked wet season
35% of Williams's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is August at 2.0", on a 39.4°F seasonal spread. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: August, July, September, taking 44% of the annual total between them.
- Driest month: June at 0.3".
- Winter share: 24% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
Williams is dry, and what does fall arrives gently
Only about 60 days a year record measurable precipitation here, 16% of the calendar, and they carry 12.0" between them. At roughly 0.20 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is July at about 10 wet days; the driest is June at about 1.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
October 19
50% probability date
Last Spring Freeze
May 9
50% probability date
Growing Season
163 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,334
Higher = more heating needed
Cooling Degree Days
567
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside AZ closest to Williams on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (52°F here).
- Atwood, KS 52°F · 0.0°F off
- Boston, MA 52°F · 0.0°F off
- Connellsville, PA 52°F · 0.0°F off
- Curtis, NE 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (12.0" here), excluding temperature-peer places.
- Chelan, WA 12.0" · 0.0" off
- Jackson, MT 11.9" · 0.0" off
- Kaycee, WY 11.9" · 0.0" off
- Thermopolis, WY 11.9" · 0.0" off
Scarce-water calendar
Where Williams's limited precipitation lands
heating led · dry · mid swing
Williams's energy balance leans toward cold weather: 5,334 annual heating degree days against 567 for cooling. Its 39.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Williams's frost-free season lasts about 163 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and December mark the typical warm and cold ends of the calendar in Williams's middle-range seasonal profile. The measured spread is 39.4°F. The annual average is 52°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Williams's cold-season load does not imply a wet climate. Annual precipitation is 12.0 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Williams wettest normal
August
August concentrates the scarce annual total (12.0 inches).
Williams driest normal
June
June is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Williams's climate
How dry is Williams? ▼
How many days above 90°F does Williams get? ▼
How much energy does heating and cooling require in Williams? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Williams's primary station: WILLIAMS 35 NNW (USW00053155). 2 NOAA stations are mapped to the Williams area; the primary station's record is used for consistency. For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0483160). Match rule for Williams: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Williams comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.