Pasco weather in May: Pasco, Washington: normal highs, lows, rain and records for May
Pasco in May has a normal high of 77°F and a normal low of 46°F, a daily mean of 61°F, rising from 73°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 7 days in a normal May, 0.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 8°C, 18 mm of precipitation in May.
- NOAA stationPasco Tri Cities Airport
- Station IDUSW00024163
- Location46.27°N 119.12°W
- Elevation407 ft (124 m)
- Population81,724
- Jan 41° 28°
- Feb 49° 28°
- Mar 59° 33°
- Apr 67° 38°
- May 77° 46°
- Jun 83° 53°
- Jul 93° 57°
- Aug 91° 56°
- Sep 81° 48°
- Oct 66° 38°
- Nov 50° 32°
- Dec 41° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pasco in May?
The normal high is 77°F and the normal low 46°F, for a daily mean of 61.4°F. May is 8.7°F warmer than April and 6.4°F cooler than June. May is the 5th warmest month of the year in Pasco and the 4th wettest. Across the month the normal high rises 6°F, from 73°F on May 1 to 79°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 59°F and 64°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 23%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 73°F | 41°F | 21% | 7% |
| May 8 | 75°F | 44°F | 22% | 7% |
| May 15 | 77°F | 46°F | 23% | 8% |
| May 22 | 78°F | 48°F | 23% | 8% |
| May 31 | 79°F | 51°F | 21% | 8% |
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 | 73°F | 41°F | 21% | 7% | 14 h 20 min |
| May 2 | 73°F | 42°F | 22% | 7% | 14 h 20 min |
| May 3 | 73°F | 42°F | 22% | 7% | 14 h 20 min |
| May 4 | 74°F | 42°F | 22% | 7% | 14 h 30 min |
| May 5 | 74°F | 43°F | 22% | 7% | 14 h 30 min |
| May 6 | 74°F | 43°F | 22% | 7% | 14 h 30 min |
| May 7 | 75°F | 43°F | 22% | 7% | 14 h 40 min |
| May 8 | 75°F | 44°F | 22% | 7% | 14 h 40 min |
| May 9 | 75°F | 44°F | 22% | 7% | 14 h 40 min |
| May 10 | 75°F | 44°F | 22% | 7% | 14 h 40 min |
| May 11 | 76°F | 45°F | 22% | 8% | 14 h 50 min |
| May 12 | 76°F | 45°F | 22% | 8% | 14 h 50 min |
| May 13 | 76°F | 45°F | 22% | 8% | 14 h 50 min |
| May 14 | 76°F | 46°F | 22% | 8% | 14 h 50 min |
| May 15 | 77°F | 46°F | 23% | 8% | 15 h |
| May 16 | 77°F | 47°F | 23% | 8% | 15 h |
| May 17 | 77°F | 47°F | 23% | 8% | 15 h |
| May 18 | 77°F | 47°F | 23% | 8% | 15 h |
| May 19 | 78°F | 48°F | 23% | 8% | 15 h 10 min |
| May 20 | 78°F | 48°F | 23% | 8% | 15 h 10 min |
| May 21 | 78°F | 48°F | 23% | 8% | 15 h 10 min |
| May 22 | 78°F | 48°F | 23% | 8% | 15 h 10 min |
| May 23 | 78°F | 49°F | 22% | 8% | 15 h 10 min |
| May 24 | 78°F | 49°F | 22% | 8% | 15 h 20 min |
| May 25 | 79°F | 49°F | 22% | 8% | 15 h 20 min |
| May 26 | 79°F | 50°F | 22% | 8% | 15 h 20 min |
| May 27 | 79°F | 50°F | 22% | 8% | 15 h 20 min |
| May 28 | 79°F | 50°F | 22% | 8% | 15 h 20 min |
| May 29 | 79°F | 50°F | 21% | 8% | 15 h 30 min |
| May 30 | 79°F | 51°F | 21% | 8% | 15 h 30 min |
| May 31 | 79°F | 51°F | 21% | 8% | 15 h 30 min |
- Normal high
- 77°FMay average
- Normal low
- 46°FMay average
- Precipitation
- 0.71 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 3
- Nights at 32°F or colder
- 2
- Daylight
- 14 h 20 min to 15 h 30 minMay 1 to May 31
- Days at 70°F or more
- 24
- Days at 80°F or more
- 11
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024163; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pasco in May?
On a given May day the chance of 0.01 inch or more is 22% on average, highest around May 17 (23%). In all, 0.71 in falls on 7 days of a normal May.
In a normal May in Pasco, 3 days reach 90°F and 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024163.
What are the records for May in Pasco?
The warmest May temperature on this station's record (since 1945) is 101°F, on May 23, 2001; the coldest is 28°F, on May 5, 1999. The wettest May brought 1.52 in (2016).
The May mean against the 1991-2020 normal of 61.4°F: 2021 63.2°F (+1.8), 2022 60.0°F (−1.4), 2023 67.2°F (+5.8), 2024 60.8°F (−0.6), 2025 60.9°F (−0.5), 2026 63.9°F (+2.5). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 63.2°F | +1.8°F | 0.19 in |
| 2022 | 60.0°F | −1.4°F | 0.96 in |
| 2023 | 67.2°F | +5.8°F | 0.03 in |
| 2024 | 60.8°F | −0.6°F | 0.82 in |
| 2025 | 60.9°F | −0.5°F | 0.90 in |
| 2026 | 63.9°F | +2.5°F | 0.06 in |
Source: records: ACIS, station USW00024163; recent months: ACIS, station USW00024163. Records and recent months use complete months only.
How does May in Pasco 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; Pasco's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.