May
May · June · September
90climate match
United States · 1991–2020
Best time to visit
Ainsworth Junction.
May leads for comfortable weather in Ainsworth Junction: typically 24°C by day, 10.2°C at night, with 21 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high24°C
Typical low10.2°C
Rain in May21 mm
July
July · August · June
77climate match
April
April · October · May
89climate match
The weakest month is January, scoring 6 against May’s 90 — days reach only 5.4°C, 19° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
65.4° / -1.3°
Feb
208.9° / -0.6°
Mar
4514.5° / 2.3°
Apr
6619° / 5.8°
May
9024° / 10.2°
Jun
8527.9° / 13.8°
Jul
6733° / 17.1°
Aug
7032.4° / 16.5°
Sep
8526.9° / 11.9°
Oct
6618.7° / 6.2°
Nov
2910.5° / 1.7°
Dec
65.3° / -1.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.4°C | -1.3°C | 29 mm | 6.5 | 8 h 59 | 6 | Strong coverage |
| February | 8.9°C | -0.6°C | 20 mm | 4.8 | 10 h 15 | 20 | Strong coverage |
| March | 14.5°C | 2.3°C | 17 mm | 4.4 | 11 h 45 | 45 | Strong coverage |
| April | 19°C | 5.8°C | 15 mm | 4.1 | 13 h 29 | 66 | Strong coverage |
| May | 24°C | 10.2°C | 21 mm | 4 | 14 h 57 | 90 | Strong coverage |
| June | 27.9°C | 13.8°C | 15 mm | 3.4 | 15 h 45 | 85 | Strong coverage |
| July | 33°C | 17.1°C | 5 mm | 1.2 | 15 h 26 | 67 | Strong coverage |
| August | 32.4°C | 16.5°C | 4 mm | 1.1 | 14 h 10 | 70 | Strong coverage |
| September | 26.9°C | 11.9°C | 7 mm | 1.7 | 12 h 29 | 85 | Strong coverage |
| October | 18.7°C | 6.2°C | 17 mm | 4 | 10 h 49 | 66 | Strong coverage |
| November | 10.5°C | 1.7°C | 22 mm | 5.4 | 9 h 22 | 29 | Strong coverage |
| December | 5.3°C | -1.1°C | 29 mm | 6.8 | 8 h 38 | 6 | Strong coverage |
What has changed
Ainsworth Junction runs +0.5°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.5
Feb
-1.0
Mar
0.0
Apr
-0.1
May
+0.5
Jun
+0.1
Jul
+1.4
Aug
+1.3
Sep
+1.1
Oct
+0.6
Nov
+0.6
Dec
+0.8
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C10 Jan 1896 | -32.8°C21 Jan 1930 | 23 mm2 Jan 2009 | 98 mm1969 · driest 1 mm in 1904 | 127 |
| February | 23.3°C21 Feb 1995 | -30.6°C3 Feb 1950 | 40 mm3 Feb 1916 | 91 mm1940 · driest 0 mm in 1967 | 129 |
| March | 30.6°C30 Mar 1911 | -13.3°C4 Mar 2019 | 23 mm12 Mar 1923 | 49 mm1904 · driest 0 mm in 1895 | 130 |
| April | 35.0°C29 Apr 1926 | -7.8°C2 Apr 1935 | 28 mm24 Apr 1936 | 48 mm2022 · driest 0 mm in 1968 | 127 |
| May | 40.0°C31 May 1910 | -3.3°C1 May 1905 | 77 mm17 May 2019 | 84 mm2019 · driest 0 mm in 1920 | 127 |
| June | 45.6°C30 Jun 2021 | 1.7°C4 Jun 1984 | 36 mm26 Jun 1942 | 58 mm1948 · driest 0 mm in 1932 | 125 |
| July | 46.1°C27 Jul 1939 | 3.3°C2 Jul 1921 | 22 mm5 Jul 1948 | 38 mm1992 · driest 0 mm in 1960 | 129 |
| August | 46.1°C10 Aug 1898 | 2.8°C31 Aug 1924 | 28 mm30 Aug 1977 | 42 mm1977 · driest 0 mm in 1904 | 127 |
| September | 37.8°C2 Sep 1987 | -6.1°C24 Sep 1926 | 23 mm4 Sep 1911 | 46 mm1927 · driest 0 mm in 1987 | 127 |
| October | 31.7°C2 Oct 1991 | -10.0°C30 Oct 1935 | 31 mm29 Oct 1982 | 78 mm1947 · driest 0 mm in 1917 | 125 |
| November | 26.1°C14 Nov 1999 | -22.2°C23 Nov 1985 | 51 mm20 Nov 1921 | 86 mm1897 · driest 0 mm in 1929 | 125 |
| December | 22.2°C2 Dec 2021 | -33.9°C13 Dec 1919 | 29 mm31 Dec 1913 | 88 mm1973 · driest 2 mm in 2011 | 126 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 18 | <1 | 1 |
| February | 0 | 0 | 16 | <1 | <1 |
| March | <1 | 0 | 8 | <1 | <1 |
| April | 3 | <1 | 1 | <1 | 0 |
| May | 12 | 4 | 0 | <1 | 0 |
| June | 22 | 10 | 0 | <1 | 0 |
| July | 30 | 24 | 0 | <1 | 0 |
| August | 30 | 23 | 0 | <1 | 0 |
| September | 21 | 8 | 0 | <1 | 0 |
| October | 3 | <1 | 2 | <1 | 0 |
| November | <1 | 0 | 11 | <1 | <1 |
| December | 0 | 0 | 19 | <1 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 20% | 1% | 20% | -1.2–8.6°C |
| February | <1% | 17% | <1% | 14% | 4.8–11.7°C |
| March | 11% | 13% | <1% | 8% | 12.4–16.9°C |
| April | 43% | 11% | <1% | 5% | 17.6–22.0°C |
| May | 76% | 11% | 1% | 7% | 21.9–26.8°C |
| June | 89% | 10% | <1% | 5% | 26.5–30.9°C |
| July | 97% | 3% | <1% | <1% | 30.7–35.0°C |
| August | 96% | 4% | <1% | 2% | 29.6–34.4°C |
| September | 89% | 7% | <1% | 3% | 23.9–28.8°C |
| October | 40% | 12% | <1% | 9% | 16.9–21.3°C |
| November | 2% | 19% | 2% | 19% | 7.6–12.7°C |
| December | <1% | 22% | 2% | 21% | 2.2–7.9°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 5785372
- NOAA station
- USC00454154 · KENNEWICK
- Station distance
- 4.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 46.21°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.