September
September · June · August
80climate match
United States · 1991–2020
Best time to visit
Griffin.
September leads for comfortable weather in Griffin: typically 23°C by day, 6.5°C at night, with 37 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23°C
Typical low6.5°C
Rain in September37 mm
August
August · July · June
71climate match
September
September · May · June
83climate match
The weakest month is January, scoring 5 against September’s 80 — days reach only -2.6°C, 27° 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
5-2.6° / -14°
Feb
5-0.6° / -12.7°
Mar
55.5° / -7.5°
Apr
2812.2° / -1.8°
May
5318.4° / 4.6°
Jun
7924° / 10.2°
Jul
7528.8° / 13.4°
Aug
7828.5° / 12°
Sep
8023° / 6.5°
Oct
3513.6° / -0.7°
Nov
55.4° / -7.2°
Dec
5-0.7° / -12.2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.6°C | -14°C | 14 mm | 4 | 8 h 59 | 5 | Strong coverage |
| February | -0.6°C | -12.7°C | 15 mm | 3.8 | 10 h 15 | 5 | Strong coverage |
| March | 5.5°C | -7.5°C | 20 mm | 4.2 | 11 h 45 | 5 | Strong coverage |
| April | 12.2°C | -1.8°C | 40 mm | 5.9 | 13 h 29 | 28 | Strong coverage |
| May | 18.4°C | 4.6°C | 69 mm | 8.2 | 14 h 57 | 53 | Strong coverage |
| June | 24°C | 10.2°C | 79 mm | 9.3 | 15 h 45 | 79 | Strong coverage |
| July | 28.8°C | 13.4°C | 54 mm | 7.4 | 15 h 26 | 75 | Strong coverage |
| August | 28.5°C | 12°C | 36 mm | 4.9 | 14 h 10 | 78 | Strong coverage |
| September | 23°C | 6.5°C | 37 mm | 4.5 | 12 h 29 | 80 | Strong coverage |
| October | 13.6°C | -0.7°C | 40 mm | 5 | 10 h 49 | 35 | Strong coverage |
| November | 5.4°C | -7.2°C | 14 mm | 3.4 | 9 h 22 | 5 | Strong coverage |
| December | -0.7°C | -12.2°C | 13 mm | 3.7 | 8 h 38 | 5 | Strong coverage |
What has changed
Griffin runs +0.6°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
+1.7
Feb
-1.6
Mar
+1.1
Apr
-0.8
May
-0.3
Jun
+1.0
Jul
+0.9
Aug
+0.5
Sep
+3.3
Oct
-0.9
Nov
+0.8
Dec
+1.4
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C24 Jan 1981 | -41.7°C12 Jan 1916 | 25 mm12 Jan 2001 | 51 mm2001 · driest 0 mm in 1940 | 104 |
| February | 20.6°C2 Feb 1992 | -41.7°C15 Feb 1936 | 23 mm15 Feb 2025 | 48 mm1978 · driest 0 mm in 1916 | 105 |
| March | 26.7°C29 Mar 2015 | -33.3°C11 Mar 1998 | 35 mm24 Mar 2009 | 85 mm2009 · driest 0 mm in 1941 | 105 |
| April | 32.2°C23 Apr 1989 | -23.9°C8 Apr 1997 | 55 mm23 Apr 1932 | 138 mm1932 · driest 0 mm in 1952 | 109 |
| May | 37.2°C29 May 1934 | -12.8°C3 May 1967 | 102 mm19 May 2013 | 270 mm2013 · driest 5 mm in 1936 | 109 |
| June | 41.1°C29 Jun 1919 | -3.9°C2 Jun 1919 | 92 mm7 Jun 2007 | 206 mm1964 · driest 16 mm in 1949 | 108 |
| July | 44.4°C6 Jul 1936 | 1.7°C1 Jul 1995 | 137 mm13 Jul 1966 | 209 mm1966 · driest 11 mm in 1980 | 107 |
| August | 42.2°C7 Aug 1949 | 0.6°C19 Aug 1950 | 70 mm6 Aug 2014 | 184 mm2014 · driest 1 mm in 2001 | 105 |
| September | 38.9°C6 Sep 1978 | -12.8°C26 Sep 1934 | 68 mm8 Sep 2013 | 156 mm2013 · driest 1 mm in 1935 | 103 |
| October | 34.4°C3 Oct 1997 | -23.9°C29 Oct 1925 | 55 mm28 Oct 1982 | 134 mm1982 · driest 0 mm in 1965 | 102 |
| November | 26.7°C1 Nov 1990 | -31.1°C28 Nov 1985 | 36 mm2 Nov 2000 | 73 mm2000 · driest 0 mm in 1939 | 101 |
| December | 20.0°C9 Dec 1939 | -37.8°C21 Dec 1989 | 17 mm17 Dec 1964 | 41 mm2022 · driest 0 mm in 1925 | 105 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 6 |
| February | 0 | 0 | 28 | <1 | 6 |
| March | <1 | 0 | 29 | <1 | 5 |
| April | 1 | <1 | 20 | 1 | 3 |
| May | 5 | <1 | 5 | 2 | <1 |
| June | 15 | 4 | <1 | 3 | 0 |
| July | 25 | 13 | 0 | 2 | 0 |
| August | 24 | 14 | 0 | 1 | 0 |
| September | 13 | 5 | 2 | 1 | 0 |
| October | 2 | <1 | 17 | 1 | 2 |
| November | <1 | 0 | 28 | <1 | 4 |
| December | 0 | 0 | 31 | 0 | 6 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 84); on 2011–2025 it is September (85). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | <1% | 4% | -8.6–1.7°C |
| February | <1% | 10% | <1% | 6% | -7.2–4.8°C |
| March | 3% | 11% | 1% | 7% | -0.2–9.9°C |
| April | 16% | 18% | 3% | 15% | 8.9–16.4°C |
| May | 39% | 25% | 6% | 30% | 16.1–22.1°C |
| June | 59% | 30% | 10% | 37% | 21.3–27.4°C |
| July | 78% | 21% | 6% | 17% | 26.8–32.1°C |
| August | 80% | 17% | 4% | 14% | 25.6–31.0°C |
| September | 61% | 16% | 3% | 12% | 19.5–25.5°C |
| October | 27% | 12% | 3% | 8% | 11.1–17.9°C |
| November | 3% | 9% | <1% | 5% | 1.4–9.3°C |
| December | 0% | 10% | <1% | 6% | -6.3–3.8°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 5689414
- NOAA station
- USC00320995 · BOWMAN
- Station distance
- 13.3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 46.22°, 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.