September
September · June · May
82climate match
United States · 1991–2020
Best time to visit
Alma.
September leads for comfortable weather in Alma: typically 26.8°C by day, 11.4°C at night, with 43 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high26.8°C
Typical low11.4°C
Rain in September43 mm
August
August · June · July
71climate match
October
October · September · April
85climate match
The weakest month is January, scoring 5 against September’s 82 — days reach only 4°C, 20° below the 24°C the score treats as ideal, and nights drop to -10.3°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
54° / -10.3°
Feb
56.6° / -8.5°
Mar
3012.8° / -3.1°
Apr
5017.8° / 2.6°
May
6922.9° / 9°
Jun
7129° / 15.2°
Jul
5532° / 18.2°
Aug
6530.6° / 16.8°
Sep
8226.8° / 11.4°
Oct
6319.6° / 3.7°
Nov
2711.8° / -3.4°
Dec
55.4° / -8.5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 4°C | -10.3°C | 9 mm | 2.2 | 9 h 37 | 5 | Strong coverage |
| February | 6.6°C | -8.5°C | 12 mm | 2.3 | 10 h 37 | 5 | Strong coverage |
| March | 12.8°C | -3.1°C | 25 mm | 3.4 | 11 h 49 | 30 | Strong coverage |
| April | 17.8°C | 2.6°C | 61 mm | 6.4 | 13 h 12 | 50 | Strong coverage |
| May | 22.9°C | 9°C | 114 mm | 8.9 | 14 h 22 | 69 | Strong coverage |
| June | 29°C | 15.2°C | 92 mm | 7.7 | 15 h 00 | 71 | Strong coverage |
| July | 32°C | 18.2°C | 101 mm | 7.6 | 14 h 45 | 55 | Strong coverage |
| August | 30.6°C | 16.8°C | 80 mm | 7 | 13 h 45 | 65 | Strong coverage |
| September | 26.8°C | 11.4°C | 43 mm | 4.7 | 12 h 24 | 82 | Strong coverage |
| October | 19.6°C | 3.7°C | 43 mm | 4.2 | 11 h 04 | 63 | Strong coverage |
| November | 11.8°C | -3.4°C | 19 mm | 2.6 | 9 h 54 | 27 | Strong coverage |
| December | 5.4°C | -8.5°C | 22 mm | 2.4 | 9 h 20 | 5 | Strong coverage |
What has changed
Alma 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
+0.8
Mar
+2.7
Apr
+0.2
May
+0.2
Jun
+1.8
Jul
+0.2
Aug
+0.1
Sep
+2.4
Oct
+0.6
Nov
+2.2
Dec
+2.4
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C11 Jan 1990 | -31.1°C4 Jan 1974 | 27 mm20 Jan 2017 | 32 mm1992 · driest 0 mm in 1964 | 78 |
| February | 26.7°C22 Feb 2017 | -33.3°C15 Feb 2021 | 32 mm19 Feb 1971 | 37 mm1958 · driest 0 mm in 1996 | 76 |
| March | 36.7°C22 Mar 2026 | -27.8°C3 Mar 1960 | 58 mm17 Mar 1987 | 220 mm1987 · driest 0 mm in 1997 | 78 |
| April | 36.1°C23 Apr 1989 | -12.8°C7 Apr 2018 | 82 mm17 Apr 2016 | 180 mm2016 · driest 5 mm in 1992 | 77 |
| May | 37.8°C29 May 2006 | -7.8°C2 May 1967 | 89 mm14 May 1985 | 279 mm1995 · driest 3 mm in 1966 | 78 |
| June | 42.2°C28 Jun 2012 | 1.1°C2 Jun 1983 | 110 mm16 Jun 1957 | 246 mm2010 · driest 4 mm in 1950 | 77 |
| July | 43.9°C14 Jul 1954 | 4.4°C30 Jul 1971 | 182 mm14 Jul 1973 | 348 mm1993 · driest 9 mm in 1907 | 77 |
| August | 42.2°C18 Aug 1983 | 5.6°C27 Aug 1967 | 91 mm30 Aug 2011 | 202 mm2011 · driest 7 mm in 1952 | 77 |
| September | 40.6°C8 Sep 2013 | -6.1°C30 Sep 1984 | 78 mm29 Sep 1983 | 206 mm1973 · driest 7 mm in 1984 | 77 |
| October | 35.6°C4 Oct 1954 | -16.1°C27 Oct 1997 | 65 mm7 Oct 2008 | 184 mm2008 · driest 0 mm in 1952 | 77 |
| November | 30.0°C9 Nov 2006 | -23.3°C28 Nov 1976 | 40 mm19 Nov 2024 | 87 mm2024 · driest 0 mm in 2012 | 77 |
| December | 27.2°C24 Dec 1964 | -37.2°C23 Dec 1989 | 51 mm11 Dec 2000 | 258 mm2000 · driest 0 mm in 1954 | 79 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | <1 | 2 |
| February | <1 | 0 | 22 | <1 | 2 |
| March | 1 | <1 | 19 | <1 | <1 |
| April | 5 | 1 | 9 | 2 | <1 |
| May | 12 | 4 | <1 | 3 | 0 |
| June | 24 | 14 | 0 | 3 | 0 |
| July | 29 | 21 | 0 | 3 | 0 |
| August | 28 | 18 | 0 | 3 | 0 |
| September | 19 | 10 | <1 | 1 | 0 |
| October | 7 | 1 | 7 | 2 | <1 |
| November | <1 | 0 | 21 | <1 | <1 |
| December | 0 | 0 | 24 | <1 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 6% | <1% | 1% | -1.2–7.2°C |
| February | 5% | 8% | 1% | 3% | 0.7–11.3°C |
| March | 17% | 12% | 3% | 8% | 7.1–15.9°C |
| April | 35% | 19% | 6% | 17% | 14.7–20.2°C |
| May | 55% | 27% | 11% | 30% | 20.3–25.4°C |
| June | 72% | 25% | 10% | 26% | 26.3–31.4°C |
| July | 77% | 22% | 9% | 20% | 29.2–34.6°C |
| August | 78% | 21% | 9% | 18% | 29.1–33.3°C |
| September | 75% | 16% | 6% | 11% | 23.9–29.4°C |
| October | 51% | 12% | 4% | 9% | 17.0–22.6°C |
| November | 12% | 8% | 2% | 4% | 8.4–14.7°C |
| December | 1% | 7% | 1% | 2% | 1.2–8.5°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 5062898
- NOAA station
- USC00253595 · HARLAN CO LAKE
- Station distance
- 12.7 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 26 usable years
- Daylight
- Calculated from latitude 40.10°, 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.