May
May · June · September
84climate match
United States · 1991–2020
Best time to visit
Zillah.
May leads for comfortable weather in Zillah: typically 23.2°C by day, 8°C at night, with 20 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high23.2°C
Typical low8°C
Rain in May20 mm
July
July · August · June
75climate match
May
May · October · April
85climate match
The weakest month is January, scoring 5 against May’s 84 — days reach only 4.1°C, 20° 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
54.1° / -4.1°
Feb
188.9° / -2.6°
Mar
4114.2° / 0.7°
Apr
6018.2° / 3.7°
May
8423.2° / 8°
Jun
8426.8° / 11.6°
Jul
7431.9° / 15.1°
Aug
7431.4° / 14.1°
Sep
8027° / 9.4°
Oct
6118.8° / 3°
Nov
209.5° / -1.8°
Dec
53.5° / -4.5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 4.1°C | -4.1°C | 28 mm | 5.7 | 8 h 58 | 5 | Good coverage |
| February | 8.9°C | -2.6°C | 16 mm | 3.7 | 10 h 15 | 18 | Good coverage |
| March | 14.2°C | 0.7°C | 14 mm | 3.7 | 11 h 45 | 41 | Good coverage |
| April | 18.2°C | 3.7°C | 15 mm | 3.2 | 13 h 29 | 60 | Good coverage |
| May | 23.2°C | 8°C | 20 mm | 4.2 | 14 h 58 | 84 | Good coverage |
| June | 26.8°C | 11.6°C | 17 mm | 3 | 15 h 47 | 84 | Good coverage |
| July | 31.9°C | 15.1°C | 8 mm | 1.9 | 15 h 27 | 74 | Good coverage |
| August | 31.4°C | 14.1°C | 6 mm | 1.6 | 14 h 10 | 74 | Good coverage |
| September | 27°C | 9.4°C | 6 mm | 2.1 | 12 h 29 | 80 | Good coverage |
| October | 18.8°C | 3°C | 17 mm | 3.8 | 10 h 49 | 61 | Good coverage |
| November | 9.5°C | -1.8°C | 27 mm | 5.4 | 9 h 21 | 20 | Good coverage |
| December | 3.5°C | -4.5°C | 37 mm | 7 | 8 h 36 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C31 Jan 1971 | -30.0°C21 Jan 1930 | 32 mm1 Jan 1997 | 82 mm1995 · driest 0 mm in 1947 | 94 |
| February | 22.2°C26 Feb 1932 | -29.4°C3 Feb 1950 | 23 mm4 Feb 2010 | 90 mm1940 · driest 0 mm in 1988 | 95 |
| March | 30.0°C20 Mar 1925 | -14.4°C2 Mar 1993 | 21 mm15 Mar 1987 | 60 mm1957 · driest 0 mm in 1973 | 93 |
| April | 34.4°C24 Apr 1977 | -7.8°C20 Apr 1927 | 23 mm24 Apr 1974 | 56 mm1995 · driest 0 mm in 1927 | 96 |
| May | 38.9°C30 May 1983 | -3.3°C4 May 1975 | 38 mm15 May 2011 | 57 mm2004 · driest 0 mm in 1979 | 95 |
| June | 40.0°C17 Jun 1961 | 0.6°C1 Jun 1984 | 35 mm6 Jun 1951 | 83 mm1991 · driest 0 mm in 1949 | 97 |
| July | 43.3°C24 Jul 2006 | 2.2°C30 Jul 1917 | 37 mm23 Jul 1992 | 52 mm1923 · driest 0 mm in 2003 | 96 |
| August | 41.1°C4 Aug 1978 | 1.7°C28 Aug 1984 | 31 mm18 Aug 1975 | 45 mm1975 · driest 0 mm in 2002 | 94 |
| September | 38.3°C7 Sep 1944 | -5.0°C25 Sep 1926 | 18 mm16 Sep 1954 | 41 mm1986 · driest 0 mm in 1953 | 93 |
| October | 31.7°C2 Oct 1935 | -11.1°C31 Oct 2002 | 26 mm29 Oct 1982 | 56 mm1950 · driest 0 mm in 1919 | 95 |
| November | 23.9°C23 Nov 1959 | -22.8°C23 Nov 1985 | 58 mm27 Nov 2009 | 82 mm1926 · driest 0 mm in 1976 | 94 |
| December | 20.0°C13 Dec 1917 | -30.0°C14 Dec 1919 | 32 mm13 Dec 1977 | 99 mm1996 · driest 1 mm in 1946 | 96 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | <1 | 3 |
| February | 0 | 0 | 23 | <1 | <1 |
| March | <1 | 0 | 15 | <1 | <1 |
| April | 2 | <1 | 5 | <1 | 0 |
| May | 10 | 3 | <1 | <1 | 0 |
| June | 20 | 8 | 0 | <1 | 0 |
| July | 29 | 21 | 0 | <1 | 0 |
| August | 29 | 21 | 0 | 0 | 0 |
| September | 21 | 9 | <1 | <1 | 0 |
| October | 3 | <1 | 7 | <1 | <1 |
| November | 0 | 0 | 21 | <1 | <1 |
| December | 0 | 0 | 28 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 18% | 2% | 16% | -1.4–7.5°C |
| February | <1% | 15% | <1% | 11% | 5.3–11.8°C |
| March | 9% | 12% | <1% | 8% | 11.9–16.7°C |
| April | 36% | 9% | 1% | 5% | 16.7–21.5°C |
| May | 71% | 9% | <1% | 6% | 21.0–26.0°C |
| June | 89% | 8% | 1% | 4% | 24.9–30.4°C |
| July | 96% | 4% | <1% | 1% | 29.2–33.9°C |
| August | 95% | 5% | <1% | 2% | 28.8–33.1°C |
| September | 87% | 7% | <1% | 4% | 23.8–29.0°C |
| October | 42% | 10% | <1% | 8% | 17.4–21.3°C |
| November | 1% | 18% | 2% | 16% | 7.1–12.3°C |
| December | 0% | 20% | 2% | 20% | 1.2–7.1°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 5816719
- NOAA station
- USC00458959 · WAPATO
- Station distance
- 12.7 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 19 usable years
- Daylight
- Calculated from latitude 46.40°, 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.