Walla Walla weather in May: Walla Walla, Washington: normal highs, lows, rain and records for May
Walla Walla in May has a normal high of 71°F and a normal low of 49°F, a daily mean of 60°F, rising from 67°F on the 1st to 75°F by the 31st. Measurable precipitation falls on 10 days in a normal May, 2.07 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 10°C, 53 mm of precipitation in May.
- NOAA stationWalla Walla Regional Airport
- Station IDUSW00024160
- Location46.09°N 118.29°W
- Elevation1,166 ft (355 m)
- Population33,901
- Jan 42° 31°
- Feb 47° 33°
- Mar 56° 38°
- Apr 63° 43°
- May 71° 49°
- Jun 79° 55°
- Jul 90° 62°
- Aug 89° 62°
- Sep 79° 54°
- Oct 63° 44°
- Nov 49° 36°
- Dec 41° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Walla Walla in May?
The normal high is 71°F and the normal low 49°F, for a daily mean of 60.4°F. May is 7.9°F warmer than April and 6.6°F cooler than June. May is the 5th warmest month of the year in Walla Walla and the 5th wettest. Across the month the normal high rises 8°F, from 67°F on May 1 to 75°F on May 31. From one year to the next May's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Mays in three average between 58°F and 63°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 | 67°F | 46°F | 33% | 16% |
| May 8 | 69°F | 47°F | 32% | 15% |
| May 15 | 72°F | 49°F | 32% | 15% |
| May 22 | 73°F | 51°F | 32% | 15% |
| May 31 | 75°F | 53°F | 30% | 14% |
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 | 67°F | 46°F | 33% | 16% | 14 h 20 min |
| May 2 | 67°F | 46°F | 33% | 16% | 14 h 20 min |
| May 3 | 68°F | 46°F | 33% | 16% | 14 h 20 min |
| May 4 | 68°F | 46°F | 32% | 16% | 14 h 30 min |
| May 5 | 68°F | 47°F | 32% | 16% | 14 h 30 min |
| May 6 | 69°F | 47°F | 32% | 16% | 14 h 30 min |
| May 7 | 69°F | 47°F | 32% | 15% | 14 h 30 min |
| May 8 | 69°F | 47°F | 32% | 15% | 14 h 40 min |
| May 9 | 70°F | 48°F | 32% | 15% | 14 h 40 min |
| May 10 | 70°F | 48°F | 32% | 15% | 14 h 40 min |
| May 11 | 70°F | 48°F | 32% | 15% | 14 h 50 min |
| May 12 | 71°F | 49°F | 32% | 15% | 14 h 50 min |
| May 13 | 71°F | 49°F | 32% | 15% | 14 h 50 min |
| May 14 | 71°F | 49°F | 32% | 15% | 14 h 50 min |
| May 15 | 72°F | 49°F | 32% | 15% | 15 h |
| May 16 | 72°F | 50°F | 32% | 15% | 15 h |
| May 17 | 72°F | 50°F | 32% | 15% | 15 h |
| May 18 | 72°F | 50°F | 32% | 15% | 15 h |
| May 19 | 73°F | 50°F | 32% | 15% | 15 h |
| May 20 | 73°F | 51°F | 32% | 15% | 15 h 10 min |
| May 21 | 73°F | 51°F | 32% | 15% | 15 h 10 min |
| May 22 | 73°F | 51°F | 32% | 15% | 15 h 10 min |
| May 23 | 73°F | 51°F | 32% | 15% | 15 h 10 min |
| May 24 | 74°F | 51°F | 31% | 15% | 15 h 20 min |
| May 25 | 74°F | 52°F | 31% | 15% | 15 h 20 min |
| May 26 | 74°F | 52°F | 31% | 15% | 15 h 20 min |
| May 27 | 74°F | 52°F | 31% | 14% | 15 h 20 min |
| May 28 | 74°F | 52°F | 30% | 14% | 15 h 20 min |
| May 29 | 75°F | 52°F | 30% | 14% | 15 h 20 min |
| May 30 | 75°F | 52°F | 30% | 14% | 15 h 30 min |
| May 31 | 75°F | 53°F | 30% | 14% | 15 h 30 min |
- Normal high
- 71°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 2.07 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 14 h 20 min to 15 h 30 minMay 1 to May 31
- Days at 70°F or more
- 17
- Days at 80°F or more
- 7
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024160; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Walla Walla in May?
On a given May day the chance of 0.01 inch or more is 32% on average, highest around May 1 (33%). In all, 2.07 in falls on 10 days of a normal May.
In a normal May in Walla Walla, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024160.
How humid and windy is Walla Walla in May?
At 3 p.m. the normal temperature is 74°F with 36% relative humidity and a dew point of 45°F; at 6 a.m. it is 58°F with 64% humidity. The wind averages 8.5 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 58°F | 46°F | 64% | 7.6 mph | 62% |
| 9 a.m. | 64°F | 46°F | 51% | 8.9 mph | 60% |
| noon | 71°F | 46°F | 41% | 8.3 mph | 61% |
| 3 p.m. | 74°F | 45°F | 36% | 8.7 mph | 64% |
| 6 p.m. | 71°F | 46°F | 40% | 8.8 mph | 63% |
| 9 p.m. | 62°F | 47°F | 59% | 9.0 mph | 61% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024160. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Walla Walla?
The warmest May temperature on this station's record (since 1949) is 100°F, on May 28, 1983; the coldest is 26°F, on May 1, 1954. The wettest May brought 6.63 in (1991).
The May mean against the 1991-2020 normal of 60.4°F: 2021 60.2°F (−0.2), 2022 54.5°F (−5.9), 2023 63.8°F (+3.4), 2024 58.3°F (−2.1), 2025 60.6°F (+0.2), 2026 63.0°F (+2.6). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.2°F | −0.2°F | 0.30 in |
| 2022 | 54.5°F | −5.9°F | 3.66 in |
| 2023 | 63.8°F | +3.4°F | 0.29 in |
| 2024 | 58.3°F | −2.1°F | 2.32 in |
| 2025 | 60.6°F | +0.2°F | 0.92 in |
| 2026 | 63.0°F | +2.6°F | 0.27 in |
Source: records: ACIS, station USW00024160; recent months: ACIS, station USW00024160. Records and recent months use complete months only.
How does May in Walla Walla 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; Walla Walla's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.