Pullman, Washington climate: Normal weather by month, frost dates and records
Pullman's normal year runs from 27°F December nights to 83°F July afternoons, with 17.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.2°C, December lows of −3°C, July highs of 28°C, 445 mm of precipitation a year.
- NOAA stationPullman Moscow Regional Airport
- Station IDUSW00094129
- Location46.74°N 117.11°W
- Elevation2,551 ft (778 m)
- Population33,543
On October 22, the normal high in Pullman is 56°F and the normal low 36°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Pullman.
- Jan 38° 28°
- Feb 42° 29°
- Mar 49° 33°
- Apr 56° 37°
- May 65° 44°
- Jun 72° 48°
- Jul 83° 51°
- Aug 83° 50°
- Sep 74° 45°
- Oct 59° 38°
- Nov 45° 33°
- Dec 37° 27°
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 Pullman each month?
July is the warmest month, with normal highs of 83°F; December the coldest, with normal lows of 27°F. The most precipitation falls in December (2.21 in), the least in July (0.39 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 28°F | 32.7°F | 2.15 | 14 | <1 | 22 | 9 h |
| February | 42°F | 29°F | 35.4°F | 1.59 | 13 | <1 | 20 | 10 h 20 min |
| March | 49°F | 33°F | 41.1°F | 1.95 | 14 | <1 | 16 | 11 h 50 min |
| April | 56°F | 37°F | 46.8°F | 1.79 | 10 | <1 | 9 | 13 h 30 min |
| May | 65°F | 44°F | 54.5°F | 1.41 | 10 | <1 | 3 | 15 h |
| June | 72°F | 48°F | 59.8°F | 1.17 | 7 | 1 | <1 | 15 h 50 min |
| July | 83°F | 51°F | 67.0°F | 0.39 | 3 | 8 | <1 | 15 h 30 min |
| August | 83°F | 50°F | 66.9°F | 0.49 | 4 | 8 | <1 | 14 h 20 min |
| September | 74°F | 45°F | 59.8°F | 0.65 | 5 | 2 | 1 | 12 h 40 min |
| October | 59°F | 38°F | 48.4°F | 1.59 | 9 | <1 | 9 | 11 h |
| November | 45°F | 33°F | 38.6°F | 2.14 | 13 | <1 | 15 | 9 h 30 min |
| December | 37°F | 27°F | 31.7°F | 2.21 | 14 | <1 | 25 | 8 h 30 min |
| Year (annual) | 59°F | 39°F | 48.6°F | 17.53 | 114 | 20 | 119 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −2°C | 0.4°C | 55 mm |
| February | 5°C | −2°C | 1.9°C | 40 mm |
| March | 10°C | 0°C | 5.1°C | 50 mm |
| April | 14°C | 3°C | 8.2°C | 45 mm |
| May | 19°C | 7°C | 12.5°C | 36 mm |
| June | 22°C | 9°C | 15.4°C | 30 mm |
| July | 28°C | 11°C | 19.4°C | 10 mm |
| August | 29°C | 10°C | 19.4°C | 12 mm |
| September | 23°C | 7°C | 15.4°C | 17 mm |
| October | 15°C | 3°C | 9.1°C | 40 mm |
| November | 7°C | 0°C | 3.7°C | 54 mm |
| December | 3°C | −3°C | −0.2°C | 56 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Pullman's own co-op station Pullman (2 mi NW) does: 33 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094129; 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 Pullman?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (3).
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 USW00094129.
When is the last frost in Pullman?
In Pullman, the last spring frost (32°F) comes after April 29 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 2 in half of years and before September 17 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
- April 291 year in 10 after May 14; 9 in 10 after April 7
- First autumn frost, half of years before
- October 21 year in 10 before September 17; 9 in 10 before October 25
NOAA puts the median frost-free season at 159 days, and the season without a hard freeze (28°F) at 197 days.
A hard freeze (28°F) comes after April 3 in half of springs and before October 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Pullman in zone 6b in ZIP code 99163, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Pullman's NOAA station is in zone 6b: the coldest night of a typical year reaches −3°F (22 complete years).
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094129; 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 Pullman?
In a normal year in Pullman, 20 days a year reach 90°F (1 of them 100°F or more), 119 nights fall to 32°F or colder and 114 days bring measurable precipitation.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 119a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 114a normal year
The highest temperature in Pullman's official record (kept by the National Weather Service since 1893) is 110°F, on August 4, 1961; the lowest is −32°F, on December 30, 1968.
The wettest calendar year on that record is 1958, with 29.85 in; the snowiest season is 1948–49, with 90.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00094129; records: ACIS (NOAA Regional Climate Centers), NWS threaded record PUWthr. Records use complete months only; a month missing more than three days is left out.
How sunny is Pullman?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Pullman, 4.0 kWh per square metre a day. July is the sunniest month (91%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.3 |
| February | 64% | 2.2 |
| March | 64% | 3.3 |
| April | 70% | 4.8 |
| May | 75% | 6.0 |
| June | 78% | 6.8 |
| July | 91% | 7.5 |
| August | 88% | 6.2 |
| September | 83% | 4.5 |
| October | 73% | 2.8 |
| November | 61% | 1.5 |
| December | 55% | 1.0 |
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 Pullman need?
A normal year in Pullman brings 6,253 heating degree days, 16% more than the median U.S. place (5,373), and 284 cooling degree days, 69% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,949 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,001 | 0 |
| February | 829 | 0 |
| March | 741 | 0 |
| April | 546 | 0 |
| May | 332 | 8 |
| June | 179 | 23 |
| July | 48 | 110 |
| August | 50 | 109 |
| September | 189 | 33 |
| October | 515 | 1 |
| November | 792 | 0 |
| December | 1,031 | 0 |
| Year (annual) | 6,253 | 284 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094129. 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.
Has Pullman been warmer than normal lately?
2025 averaged 50.0°F, 1.4°F above the 1991-2020 normal of 48.6°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 49.4°F | +0.8°F | 16.92 |
| 2022 | 47.4°F | −1.2°F | 24.83 |
| 2023 | 49.2°F | +0.6°F | 13.30 |
| 2025 | 50.0°F | +1.4°F | 19.36 |
Source: observed years: ACIS, station USW00094129. A year counts only with all twelve months complete.
How does Pullman's climate compare?
Pullman is warmer than 19 of the other 95 places with their own NOAA record in Washington, and wetter than 34. Across the 7,247 U.S. stations with normals, its annual mean of 48.6°F is warmer than 34%.
In the Köppen classification computed from these normals, Pullman is Dsb: continental, dry-summer, warm summer. 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 Pullman share this climate record?
6 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.
- Genesee, ID1,103 people · 16 mi SE
- Troy, ID942 people · 16 mi E
- Juliaetta, ID650 people · 22 mi SE
- Deary, ID538 people · 26 mi E
- Kendrick, ID304 people · 23 mi SE
- Viola, ID48 people · 8 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.
What do Pullman's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Pullman. This page uses Pullman Moscow Regional Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Pullman (2 mi NW) USC00456789 | 4 mi W | 2,515 ft | 48.2°F | 26°F | 84°F | 20.4 | 33 | May 6 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Pullman's climate
What is the coldest month in Pullman?
December, with a normal high of 37°F and a normal low of 27°F. The warmest is July (83°F by day, 51°F at night).
Does it snow in Pullman?
Yes. NOAA publishes no 1991-2020 snowfall normal for Pullman's NOAA station; Pullman's own co-op station Pullman (2 mi NW) records 33 inches of snow in a normal year.
What is the rainiest month in Pullman?
December, with 2.21 in of precipitation in a normal year; the driest is July with 0.39 in.
What plant hardiness zone is Pullman in?
The USDA's 2023 map puts Pullman in zone 6b in ZIP code 99163, the nearest ZIP area. By the same method at Pullman's NOAA station, the coldest night of a typical year reaches −3°F (22 years, 1991-2020): zone 6b.
How late can frost come in Pullman?
In half of years the last 32°F night comes after April 29; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pullman in OctoberThis month day by day, its records and recent years
- Washington climateThe statewide normals and every place in the state
- Moscow, ID7 miles from this station, 46.4°F a year
- Potlatch, ID19 miles from this station, 46.9°F a year
- Lewiston, ID26 miles from this station, 53.8°F a year
- Pomeroy, WA30 miles from this station, 49.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made