August
August · September · July
80climate match
United States · 1991–2020
Best time to visit
Custer.
August leads for comfortable weather in Custer: typically 26°C by day, 11.8°C at night, with 66 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortAugust
Typical high26°C
Typical low11.8°C
Rain in August66 mm
August
August · July · September
55climate match
September
September · June · August
86climate match
The weakest month is January, scoring 5 against August’s 80 — days reach only 3.1°C, 21° below the 24°C the score treats as ideal, and nights drop to -8.9°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
53.1° / -8.9°
Feb
53.2° / -8.9°
Mar
97.9° / -5°
Apr
2011.3° / -1.5°
May
3816.5° / 3.8°
Jun
6722.7° / 9°
Jul
7526.4° / 12.6°
Aug
8026° / 11.8°
Sep
7722° / 7.3°
Oct
3813.6° / 0.3°
Nov
87.1° / -5°
Dec
52.7° / -8.7°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.1°C | -8.9°C | 8 mm | 2.6 | 9 h 15 | 5 | Strong coverage |
| February | 3.2°C | -8.9°C | 18 mm | 4 | 10 h 24 | 5 | Strong coverage |
| March | 7.9°C | -5°C | 26 mm | 4.9 | 11 h 47 | 9 | Good coverage |
| April | 11.3°C | -1.5°C | 59 mm | 8.1 | 13 h 22 | 20 | Strong coverage |
| May | 16.5°C | 3.8°C | 101 mm | 11.3 | 14 h 42 | 38 | Good coverage |
| June | 22.7°C | 9°C | 106 mm | 11.4 | 15 h 26 | 67 | Good coverage |
| July | 26.4°C | 12.6°C | 85 mm | 9.5 | 15 h 09 | 75 | Strong coverage |
| August | 26°C | 11.8°C | 66 mm | 7.1 | 13 h 59 | 80 | Good coverage |
| September | 22°C | 7.3°C | 42 mm | 4.7 | 12 h 27 | 77 | Good coverage |
| October | 13.6°C | 0.3°C | 29 mm | 4.7 | 10 h 56 | 38 | Good coverage |
| November | 7.1°C | -5°C | 14 mm | 3.1 | 9 h 36 | 8 | Good coverage |
| December | 2.7°C | -8.7°C | 9 mm | 2.2 | 8 h 56 | 5 | Strong coverage |
What has changed
Custer 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
+1.1
Feb
-2.3
Mar
+1.0
Apr
-0.9
May
-1.3
Jun
+0.9
Jul
-0.3
Aug
-0.3
Sep
+1.7
Oct
-2.0
Nov
+0.3
Dec
-0.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C24 Jan 1981 | -41.7°C19 Jan 1963 | 15 mm27 Jan 1944 | 42 mm1944 · driest 0 mm in 2013 | 80 |
| February | 20.0°C23 Feb 1958 | -36.7°C28 Feb 1962 | 19 mm7 Feb 2001 | 51 mm1987 · driest 0 mm in 1947 | 82 |
| March | 25.0°C22 Mar 2026 | -34.4°C12 Mar 1956 | 27 mm14 Mar 1973 | 61 mm1992 · driest 0 mm in 1953 | 83 |
| April | 28.9°C21 Apr 1989 | -22.2°C2 Apr 1975 | 90 mm10 Apr 1943 | 131 mm1943 · driest 3 mm in 1952 | 80 |
| May | 32.2°C28 May 1969 | -15.0°C3 May 1954 | 102 mm22 May 1952 | 224 mm1978 · driest 2 mm in 1966 | 79 |
| June | 36.1°C23 Jun 1954 | -7.2°C4 Jun 1951 | 88 mm10 Jun 1972 | 208 mm1947 · driest 0 mm in 2013 | 78 |
| July | 37.8°C12 Jul 1954 | -3.9°C17 Jul 2025 | 66 mm27 Jul 2017 | 179 mm2018 · driest 9 mm in 1975 | 79 |
| August | 35.6°C16 Aug 1988 | -5.6°C22 Aug 1966 | 81 mm7 Aug 1999 | 192 mm1999 · driest 12 mm in 1943 | 79 |
| September | 36.1°C3 Sep 1971 | -13.3°C30 Sep 1961 | 55 mm30 Sep 2014 | 123 mm1989 · driest 1 mm in 1947 | 81 |
| October | 29.4°C1 Oct 1963 | -23.3°C25 Oct 2020 | 56 mm12 Oct 2023 | 112 mm1998 · driest 0 mm in 2013 | 82 |
| November | 24.4°C6 Nov 1975 | -31.7°C27 Nov 1952 | 20 mm1 Nov 2000 | 47 mm1998 · driest 0 mm in 1943 | 80 |
| December | 20.0°C19 Dec 1979 | -38.3°C17 Dec 1964 | 23 mm24 Dec 1948 | 42 mm1964 · driest 0 mm in 1991 | 83 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | 0 | 4 |
| February | 0 | 0 | 26 | <1 | 6 |
| March | 0 | 0 | 26 | <1 | 5 |
| April | <1 | 0 | 20 | 2 | 5 |
| May | 2 | <1 | 7 | 3 | <1 |
| June | 10 | 2 | <1 | 3 | <1 |
| July | 20 | 7 | 0 | 3 | 0 |
| August | 20 | 5 | 0 | 2 | 0 |
| September | 11 | 2 | 2 | 1 | <1 |
| October | 1 | 0 | 15 | <1 | 2 |
| November | 0 | 0 | 25 | <1 | 4 |
| December | 0 | 0 | 29 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 9% | <1% | 3% | -1.0–4.5°C |
| February | 0% | 12% | <1% | 6% | -0.5–6.7°C |
| March | 2% | 16% | 2% | 12% | 3.2–10.2°C |
| April | 10% | 22% | 5% | 21% | 8.1–14.5°C |
| May | 25% | 30% | 9% | 35% | 13.7–19.3°C |
| June | 51% | 32% | 9% | 36% | 19.7–24.8°C |
| July | 69% | 26% | 8% | 28% | 24.7–28.8°C |
| August | 73% | 22% | 6% | 19% | 24.1–28.0°C |
| September | 57% | 16% | 4% | 13% | 18.6–24.1°C |
| October | 24% | 13% | 3% | 6% | 10.8–17.1°C |
| November | 2% | 10% | <1% | 5% | 4.3–9.7°C |
| December | 0% | 9% | <1% | 2% | -0.5–5.7°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 5763910
- NOAA station
- USC00392087 · CUSTER
- Station distance
- 1.4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 23 usable years
- Daylight
- Calculated from latitude 43.77°, 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.