September
September · June · August
80climate match
United States · 1991–2020
Best time to visit
Belle Fourche.
September leads for comfortable weather in Belle Fourche: typically 25.8°C by day, 7.9°C at night, with 34 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.8°C
Typical low7.9°C
Rain in September34 mm
July
July · August · June
71climate match
May
May · September · October
79climate match
The weakest month is January, scoring 5 against September’s 80 — days reach only 2.5°C, 21° below the 24°C the score treats as ideal, and nights drop to -11.1°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
52.5° / -11.1°
Feb
54.5° / -9.5°
Mar
179.9° / -4.9°
Apr
4015.6° / 0.4°
May
6320.7° / 6.1°
Jun
7626.8° / 12°
Jul
7131.2° / 15.3°
Aug
7231° / 13.8°
Sep
8025.8° / 7.9°
Oct
4917° / 1.3°
Nov
148.9° / -5°
Dec
53.3° / -9.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 2.5°C | -11.1°C | 11 mm | 3.1 | 9 h 09 | 5 | Strong coverage |
| February | 4.5°C | -9.5°C | 14 mm | 3.4 | 10 h 21 | 5 | Strong coverage |
| March | 9.9°C | -4.9°C | 23 mm | 3.9 | 11 h 46 | 17 | Strong coverage |
| April | 15.6°C | 0.4°C | 53 mm | 6.4 | 13 h 24 | 40 | Strong coverage |
| May | 20.7°C | 6.1°C | 77 mm | 7.6 | 14 h 47 | 63 | Strong coverage |
| June | 26.8°C | 12°C | 71 mm | 8.1 | 15 h 33 | 76 | Strong coverage |
| July | 31.2°C | 15.3°C | 49 mm | 6.6 | 15 h 15 | 71 | Strong coverage |
| August | 31°C | 13.8°C | 37 mm | 5.3 | 14 h 03 | 72 | Strong coverage |
| September | 25.8°C | 7.9°C | 34 mm | 4.1 | 12 h 28 | 80 | Strong coverage |
| October | 17°C | 1.3°C | 45 mm | 5.1 | 10 h 53 | 49 | Strong coverage |
| November | 8.9°C | -5°C | 14 mm | 3.3 | 9 h 31 | 14 | Strong coverage |
| December | 3.3°C | -9.6°C | 16 mm | 3.6 | 8 h 49 | 5 | Strong coverage |
What has changed
Belle Fourche runs -0.2°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
+1.4
Feb
-2.2
Mar
+1.8
Apr
-1.8
May
-1.9
Jun
+0.7
Jul
-0.3
Aug
-0.8
Sep
+1.4
Oct
-1.5
Nov
+0.7
Dec
+0.5
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C25 Jan 2005 | -39.4°C12 Jan 1916 | 28 mm27 Jan 1944 | 43 mm1926 · driest 0 mm in 2002 | 109 |
| February | 22.8°C16 Feb 2017 | -40.6°C7 Feb 1929 | 18 mm26 Feb 1998 | 43 mm1987 · driest 0 mm in 1921 | 109 |
| March | 28.3°C29 Mar 2015 | -34.4°C4 Mar 1960 | 58 mm21 Mar 1993 | 76 mm1993 · driest 0 mm in 2002 | 111 |
| April | 36.7°C21 Apr 1910 | -20.6°C3 Apr 1936 | 62 mm20 Apr 1933 | 166 mm1941 · driest 1 mm in 1952 | 107 |
| May | 39.4°C28 May 1934 | -9.4°C3 May 1954 | 108 mm20 May 1982 | 272 mm1982 · driest 2 mm in 1934 | 110 |
| June | 42.8°C20 Jun 1910 | -6.1°C2 Jun 1919 | 87 mm14 Jun 1976 | 238 mm1976 · driest 7 mm in 1983 | 110 |
| July | 44.4°C27 Jul 1931 | 0.6°C13 Jul 1996 | 63 mm12 Jul 1930 | 151 mm1922 · driest 2 mm in 1988 | 110 |
| August | 42.2°C11 Aug 1969 | -0.6°C24 Aug 1910 | 94 mm20 Aug 1923 | 193 mm1923 · driest 2 mm in 1959 | 111 |
| September | 41.7°C6 Sep 1978 | -12.2°C25 Sep 1926 | 64 mm10 Sep 2003 | 147 mm1923 · driest 0 mm in 1916 | 113 |
| October | 35.6°C4 Oct 1922 | -24.4°C30 Oct 1991 | 63 mm26 Oct 1996 | 234 mm2013 · driest 0 mm in 1918 | 109 |
| November | 28.3°C7 Nov 1999 | -32.2°C14 Nov 1959 | 38 mm5 Nov 1922 | 62 mm1922 · driest 0 mm in 1912 | 107 |
| December | 23.3°C18 Dec 1979 | -42.2°C22 Dec 1989 | 24 mm21 Dec 1911 | 58 mm1996 · driest 0 mm in 1912 | 110 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | <1 | 4 |
| February | 0 | 0 | 26 | <1 | 4 |
| March | <1 | 0 | 25 | <1 | 3 |
| April | 3 | <1 | 14 | 2 | 1 |
| May | 8 | 1 | 4 | 3 | <1 |
| June | 19 | 8 | 0 | 2 | 0 |
| July | 27 | 19 | 0 | 1 | 0 |
| August | 27 | 19 | 0 | 1 | 0 |
| September | 17 | 8 | 1 | 1 | 0 |
| October | 5 | <1 | 12 | 1 | <1 |
| November | <1 | 0 | 25 | <1 | 2 |
| December | 0 | 0 | 28 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 9% | <1% | 3% | -4.6–6.6°C |
| February | 1% | 10% | <1% | 5% | -1.6–9.4°C |
| March | 8% | 14% | 2% | 9% | 2.9–13.0°C |
| April | 28% | 21% | 5% | 20% | 11.7–19.5°C |
| May | 48% | 27% | 7% | 29% | 18.1–23.9°C |
| June | 68% | 29% | 8% | 32% | 23.4–30.2°C |
| July | 81% | 19% | 5% | 15% | 28.5–34.6°C |
| August | 83% | 16% | 4% | 11% | 28.4–33.0°C |
| September | 73% | 15% | 4% | 10% | 22.0–27.8°C |
| October | 42% | 13% | 3% | 8% | 14.1–20.7°C |
| November | 7% | 10% | <1% | 4% | 5.7–13.2°C |
| December | <1% | 10% | <1% | 5% | -1.2–6.6°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 5762718
- NOAA station
- USC00390559 · BELLE FOURCHE
- Station distance
- 0.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 25 usable years
- Daylight
- Calculated from latitude 44.67°, 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.