Window Rock, 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 Window Rock's primary NOAA station, WINDOW ROCK AP.
The climate verdict for Window Rock
Dryness leads the climate profile for Window Rock, Arizona, with 11.3 inches of precipitation a year. NOAA records an annual average of 49°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.
- 49°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 11.3"
- precipitation, annual total
- 122 days
- frost-free growing season
Window Rock: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00003029 · Window Rock, AZ 49°F mean · 11.3" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,470
- PHOTO-FINISH ≈ Marysvale
- PRCP-ARID 11.3"
- SWING-MID 42°F
- COMF-LOW 52/100
- LOAD-HEAT 6,158 HDD
- STN-1 USW00003029
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Marysvale, UT (+ 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.
- Window Rock (this station) 49°F
- Hot Antelope, OR 49°F
- Near Marysvale, UT 49°F
- Near Kooskia, ID 49°F
- Near Kodachrome Basi…, UT 49°F
Climate Living Index · Window Rock
Window Rock: 21/100 · grade F
Window Rock publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Window Rock, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 49.2°F · 18.3° from 67.5°F | 37/100 · F |
| Precipitation balance | 11.3 in · 23.6 from 35 in | 16/100 · F |
| Normal heat + freeze calendar | 201 calendar days | 13/100 · F |
| Frost-free season | 122 days/year | 8/100 · F |
Window Rock · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Window Rock'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
- 71.5°F
- Coldest month
- 29.7°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 Window Rock sits across the climate record
Three NOAA fields for Window Rock's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 36th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 91%
- Window Rock's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 43rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Window Rock compares across U.S. station-mapped locations
Window Rock'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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 14°F (-10°C) | 30°F (-1°C) | 1.0" | 29.9 | 0.0 |
| February | 49°F (10°C) | 19°F (-7°C) | 34°F (1°C) | 0.9" | 26.9 | 0.0 |
| March | 58°F (14°C) | 24°F (-5°C) | 41°F (5°C) | 0.7" | 28.7 | 0.0 |
| April | 65°F (18°C) | 29°F (-2°C) | 47°F (8°C) | 0.5" | 21.1 | 0.0 |
| May | 74°F (23°C) | 36°F (2°C) | 55°F (13°C) | 0.6" | 9.4 | 0.2 |
| June | 85°F (30°C) | 45°F (7°C) | 65°F (18°C) | 0.3" | 1.0 | 7.1 |
| July | 88°F (31°C) | 55°F (13°C) | 72°F (22°C) | 1.8" | 0.0 | 11.3 |
| August | 85°F (29°C) | 52°F (11°C) | 69°F (20°C) | 1.9" | 0.0 | 4.3 |
| September | 79°F (26°C) | 43°F (6°C) | 61°F (16°C) | 1.3" | 2.7 | 0.8 |
| October | 68°F (20°C) | 31°F (-1°C) | 49°F (10°C) | 0.9" | 18.8 | 0.0 |
| November | 56°F (13°C) | 21°F (-6°C) | 39°F (4°C) | 0.8" | 27.4 | 0.0 |
| December | 46°F (8°C) | 14°F (-10°C) | 30°F (-1°C) | 0.8" | 30.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 89°F around July 7, short of 90°F on every date, while 201 dates carry a normal low at or below freezing, the coldest 13°F near December 26.
The freezing stretch
The normal low stays at or below 32°F into April 29, then returns to freezing around October 12, covering 201 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 30, when 39% of years recorded at least a hundredth of an inch. The driest is June 6 at 10%. Summed across the calendar, that is about 77 wet dates a year.
The widest day
June 10 carries the biggest normal gap between afternoon and dawn, 41°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Window Rock.
Where Window Rock Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 201 nights a year, placing this among the most frost-prone tenth of ranked stations.
Aridity defines the water calendar: about 11 inches in a normal year lands this among the driest tenth of ranked stations.
Window Rock earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
6.1 days with precipitation
6.0 days with precipitation
5.4 days with precipitation
4.5 days with precipitation
4.4 days with precipitation
2.8 days with precipitation
10.6 days with precipitation
10.9 days with precipitation
7.0 days with precipitation
6.3 days with precipitation
5.2 days with precipitation
7.0 days with precipitation
Window Rock spreads its precipitation across the year
Neither half of the year dominates here: June through August take 34% of the annual total and December through February 24%, with neither reaching the 35% that would mark a distinct wet season. Window Rock has no dry season to plan around, though it does carry a 41.8°F seasonal spread.
The gap between the wettest and driest month still matters: August averages 1.9" and June 0.3". The three wettest months together take 44% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
Window Rock is dry, and what does fall arrives gently
Only about 76 days a year record measurable precipitation here, 21% of the calendar, and they carry 11.3" between them. At roughly 0.15 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 August at about 11 wet days; the driest is June at about 3.
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
September 28
50% probability date
Last Spring Freeze
May 29
50% probability date
Growing Season
122 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,158
Higher = more heating needed
Cooling Degree Days
414
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside AZ closest to Window Rock 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 (49°F here).
- Battle Creek, MI 49°F · 0.0°F off
- Beaconsfield, IA 49°F · 0.0°F off
- Black Forest, CO 49°F · 0.0°F off
- Council, ID 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (11.3" here), excluding temperature-peer places.
- Jackpot, NV 11.4" · 0.0" off
- Quemado, NM 11.4" · 0.0" off
- Lordsburg, NM 11.3" · 0.0" off
- Murphy, ID 11.3" · 0.0" off
Scarce-water calendar
Where Window Rock's limited precipitation lands
heating led · dry · mid swing
Window Rock's energy balance leans toward cold weather: 6,158 annual heating degree days against 414 for cooling. Its 41.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 122 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
July and December mark the typical warm and cold ends of the calendar in Window Rock's middle-range seasonal profile. The measured spread is 41.8°F. The annual average is 49°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Window Rock's cold-season load does not imply a wet climate. Annual precipitation is 11.3 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.
Window Rock wettest normal
August
August concentrates the scarce annual total (11.3 inches).
Window Rock driest normal
June
June is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Window Rock's climate
How dry is Window Rock? ▼
How cold does Window Rock get in winter? ▼
How much energy does heating and cooling require in Window Rock? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Window Rock's primary station: WINDOW ROCK AP (USW00003029). 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 a census-designated place (GEOID 0483720), not an incorporated municipality. Match rule for Window Rock: 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 Window Rock 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.