September
September · June · August
84climate match
United States · 1991–2020
Best time to visit
Union.
September leads for comfortable weather in Union: typically 25.7°C by day, 10°C at night, with 29 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.7°C
Typical low10°C
Rain in September29 mm
August
August · July · June
71climate match
September
September · May · October
81climate match
The weakest month is January, scoring 5 against September’s 84 — days reach only 5.1°C, 19° below the 24°C the score treats as ideal, and nights drop to -8.2°C.
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
55.1° / -8.2°
Feb
56.4° / -7.1°
Mar
2912.4° / -2.7°
Apr
4516° / 0.9°
May
6721.4° / 6.4°
Jun
7528.1° / 12.2°
Jul
6631.5° / 15.8°
Aug
7330.3° / 14.8°
Sep
8425.7° / 10°
Oct
5617.7° / 2.6°
Nov
2210.5° / -3.4°
Dec
55.1° / -8°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.1°C | -8.2°C | 5 mm | 1.3 | 9 h 35 | 5 | Strong coverage |
| February | 6.4°C | -7.1°C | 5 mm | 1.5 | 10 h 36 | 5 | Strong coverage |
| March | 12.4°C | -2.7°C | 19 mm | 3.4 | 11 h 49 | 29 | Strong coverage |
| April | 16°C | 0.9°C | 38 mm | 5.9 | 13 h 13 | 45 | Strong coverage |
| May | 21.4°C | 6.4°C | 64 mm | 7.9 | 14 h 24 | 67 | Strong coverage |
| June | 28.1°C | 12.2°C | 53 mm | 7.2 | 15 h 02 | 75 | Strong coverage |
| July | 31.5°C | 15.8°C | 65 mm | 7.2 | 14 h 47 | 66 | Strong coverage |
| August | 30.3°C | 14.8°C | 58 mm | 6.4 | 13 h 46 | 73 | Strong coverage |
| September | 25.7°C | 10°C | 29 mm | 4 | 12 h 25 | 84 | Strong coverage |
| October | 17.7°C | 2.6°C | 25 mm | 3.9 | 11 h 03 | 56 | Strong coverage |
| November | 10.5°C | -3.4°C | 11 mm | 2.4 | 9 h 53 | 22 | Strong coverage |
| December | 5.1°C | -8°C | 4 mm | 1 | 9 h 18 | 5 | Strong coverage |
What has changed
Union runs +1.3°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
+1.5
Feb
-0.9
Mar
+2.7
Apr
+0.7
May
-0.2
Jun
+2.0
Jul
+0.8
Aug
+1.3
Sep
+2.8
Oct
+0.3
Nov
+2.2
Dec
+2.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C26 Jan 1982 | -33.3°C12 Jan 1963 | 27 mm19 Jan 1988 | 43 mm1988 · driest 0 mm in 1964 | 89 |
| February | 25.6°C2 Feb 2020 | -33.9°C1 Feb 1951 | 30 mm26 Feb 1987 | 44 mm1987 · driest 0 mm in 1967 | 89 |
| March | 31.7°C25 Mar 2026 | -29.4°C2 Mar 1943 | 45 mm18 Mar 2003 | 80 mm1981 · driest 0 mm in 1994 | 89 |
| April | 32.8°C30 Apr 1992 | -19.4°C2 Apr 1975 | 71 mm27 Apr 2021 | 100 mm1983 · driest 1 mm in 2022 | 89 |
| May | 36.1°C26 May 1942 | -7.2°C2 May 1954 | 61 mm6 May 1973 | 187 mm1987 · driest 8 mm in 1974 | 89 |
| June | 41.7°C26 Jun 2012 | -2.2°C3 Jun 1954 | 131 mm24 Jun 2026 | 190 mm2023 · driest 5 mm in 1944 | 89 |
| July | 41.7°C20 Jul 1939 | 3.3°C8 Jul 1952 | 140 mm26 Jul 1957 | 174 mm1946 · driest 1 mm in 2002 | 90 |
| August | 42.8°C1 Aug 1938 | 3.9°C31 Aug 1944 | 85 mm21 Aug 1999 | 235 mm1999 · driest 0 mm in 2011 | 89 |
| September | 39.4°C6 Sep 2022 | -8.3°C30 Sep 1985 | 62 mm23 Sep 1940 | 131 mm1950 · driest 0 mm in 1978 | 89 |
| October | 32.8°C2 Oct 1954 | -17.7°C27 Oct 2020 | 41 mm10 Oct 2005 | 84 mm1942 · driest 0 mm in 2020 | 89 |
| November | 27.8°C27 Nov 2017 | -23.9°C16 Nov 1955 | 39 mm2 Nov 1956 | 81 mm1956 · driest 0 mm in 2006 | 89 |
| December | 26.7°C3 Dec 1941 | -31.7°C22 Dec 1989 | 26 mm8 Dec 1987 | 45 mm1987 · driest 0 mm in 1939 | 89 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | 0 | 4 |
| February | <1 | 0 | 26 | 0 | 2 |
| March | <1 | 0 | 23 | <1 | 2 |
| April | 3 | <1 | 13 | 1 | 2 |
| May | 10 | 3 | 3 | 2 | 0 |
| June | 22 | 12 | 0 | 2 | 0 |
| July | 29 | 21 | 0 | 2 | 0 |
| August | 28 | 19 | 0 | 2 | 0 |
| September | 19 | 9 | <1 | 1 | <1 |
| October | 6 | <1 | 9 | <1 | <1 |
| November | <1 | 0 | 23 | <1 | 3 |
| December | 0 | 0 | 30 | 0 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 7% | <1% | 2% | -0.6–7.8°C |
| February | 3% | 7% | <1% | 2% | 2.0–10.5°C |
| March | 14% | 14% | 2% | 10% | 7.2–14.5°C |
| April | 32% | 19% | 3% | 18% | 12.2–19.1°C |
| May | 52% | 28% | 8% | 35% | 18.2–24.1°C |
| June | 72% | 25% | 7% | 26% | 24.3–30.6°C |
| July | 76% | 24% | 7% | 22% | 29.5–33.7°C |
| August | 80% | 20% | 5% | 17% | 28.4–32.4°C |
| September | 76% | 14% | 3% | 10% | 23.0–28.5°C |
| October | 46% | 11% | 2% | 7% | 16.1–21.0°C |
| November | 10% | 9% | <1% | 3% | 6.3–13.8°C |
| December | <1% | 6% | <1% | 2% | 1.4–8.5°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 5582996
- NOAA station
- USW00024015 · AKRON WASHINGTON CO AP
- Station distance
- 33.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 27 usable years
- Daylight
- Calculated from latitude 40.38°, 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.