Pullman weather in May: Pullman, Washington: normal highs, lows, rain and records for May
Pullman in May has a normal high of 65°F and a normal low of 44°F, a daily mean of 55°F, rising from 61°F on the 1st to 68°F by the 31st. Measurable precipitation falls on 10 days in a normal May, 1.41 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 7°C, 36 mm of precipitation in May.
- NOAA stationPullman Moscow Regional Airport
- Station IDUSW00094129
- Location46.74°N 117.11°W
- Elevation2,551 ft (778 m)
- Population33,543
- 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.
How warm is Pullman in May?
The normal high is 65°F and the normal low 44°F, for a daily mean of 54.5°F. May is 7.7°F warmer than April and 5.3°F cooler than June. May is the 5th warmest month of the year in Pullman and the 8th wettest. Across the month the normal high rises 7°F, from 61°F on May 1 to 68°F on May 31. From one year to the next May's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 52°F and 57°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 61°F | 40°F | 31% | 14% |
| May 8 | 64°F | 42°F | 32% | 14% |
| May 15 | 66°F | 44°F | 32% | 14% |
| May 22 | 67°F | 45°F | 33% | 15% |
| May 31 | 68°F | 47°F | 31% | 15% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 61°F | 40°F | 31% | 14% | 14 h 20 min |
| May 2 | 62°F | 40°F | 31% | 14% | 14 h 20 min |
| May 3 | 62°F | 41°F | 31% | 14% | 14 h 30 min |
| May 4 | 62°F | 41°F | 31% | 14% | 14 h 30 min |
| May 5 | 63°F | 41°F | 31% | 14% | 14 h 30 min |
| May 6 | 63°F | 41°F | 32% | 14% | 14 h 40 min |
| May 7 | 63°F | 42°F | 32% | 14% | 14 h 40 min |
| May 8 | 64°F | 42°F | 32% | 14% | 14 h 40 min |
| May 9 | 64°F | 42°F | 32% | 14% | 14 h 40 min |
| May 10 | 64°F | 43°F | 32% | 14% | 14 h 50 min |
| May 11 | 65°F | 43°F | 32% | 14% | 14 h 50 min |
| May 12 | 65°F | 43°F | 32% | 14% | 14 h 50 min |
| May 13 | 65°F | 43°F | 32% | 14% | 14 h 50 min |
| May 14 | 65°F | 44°F | 32% | 14% | 15 h |
| May 15 | 66°F | 44°F | 32% | 14% | 15 h |
| May 16 | 66°F | 44°F | 33% | 14% | 15 h |
| May 17 | 66°F | 44°F | 33% | 14% | 15 h |
| May 18 | 66°F | 44°F | 33% | 15% | 15 h 10 min |
| May 19 | 66°F | 45°F | 33% | 15% | 15 h 10 min |
| May 20 | 67°F | 45°F | 33% | 15% | 15 h 10 min |
| May 21 | 67°F | 45°F | 33% | 15% | 15 h 10 min |
| May 22 | 67°F | 45°F | 33% | 15% | 15 h 20 min |
| May 23 | 67°F | 45°F | 33% | 15% | 15 h 20 min |
| May 24 | 67°F | 46°F | 33% | 15% | 15 h 20 min |
| May 25 | 67°F | 46°F | 32% | 15% | 15 h 20 min |
| May 26 | 68°F | 46°F | 32% | 15% | 15 h 20 min |
| May 27 | 68°F | 46°F | 32% | 15% | 15 h 30 min |
| May 28 | 68°F | 46°F | 32% | 15% | 15 h 30 min |
| May 29 | 68°F | 46°F | 32% | 15% | 15 h 30 min |
| May 30 | 68°F | 46°F | 31% | 15% | 15 h 30 min |
| May 31 | 68°F | 47°F | 31% | 15% | 15 h 30 min |
- Normal high
- 65°FMay average
- Normal low
- 44°FMay average
- Precipitation
- 1.41 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 14 h 20 min to 15 h 30 minMay 1 to May 31
- Days at 70°F or more
- 10
- Days at 80°F or more
- 3
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094129; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pullman in May?
On a given May day the chance of 0.01 inch or more is 32% on average, highest around May 20 (33%). In all, 1.41 in falls on 10 days of a normal May.
In a normal May in Pullman, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094129.
What are the records for May in Pullman?
The warmest May temperature on Pullman's official record (since 1893) is 94°F, on May 29, 1897; the coldest is 23°F, on May 2, 1954. The wettest May brought 5.43 in (1948); the snowiest, 1.0 inches (1981).
The May mean against the 1991-2020 normal of 54.5°F: 2021 53.9°F (−0.6), 2022 49.3°F (−5.2), 2023 59.5°F (+5.0), 2024 51.9°F (−2.6), 2025 54.5°F (at normal), 2026 56.0°F (+1.5). 2 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.9°F | −0.6°F | 0.35 in |
| 2022 | 49.3°F | −5.2°F | 2.40 in |
| 2023 | 59.5°F | +5.0°F | 0.72 in |
| 2024 | 51.9°F | −2.6°F | 1.13 in |
| 2025 | 54.5°F | at normal | 0.87 in |
| 2026 | 56.0°F | +1.5°F | 1.05 in |
Source: records: ACIS, NWS threaded record PUWthr; recent months: ACIS, station USW00094129. Records and recent months use complete months only.
How does May in Pullman compare across Washington?
Across the 96 places PlainClimate covers in Washington, May normal highs run from 59°F in Long Beach to 77°F in Pasco; Pullman's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.