September
September · June · August
79climate match
United States · 1991–2020
Best time to visit
Chadron.
September leads for comfortable weather in Chadron: typically 26°C by day, 7.9°C at night, with 38 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high26°C
Typical low7.9°C
Rain in September38 mm
July
July · August · June
70climate match
May
May · September · October
77climate match
The weakest month is January, scoring 5 against September’s 79 — days reach only 3.1°C, 21° below the 24°C the score treats as ideal, and nights drop to -10.4°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° / -10.4°
Feb
54.4° / -9.5°
Mar
1910.5° / -4.7°
Apr
3614.9° / -0.2°
May
5920.2° / 5.9°
Jun
7427.1° / 11.5°
Jul
6931.8° / 15.2°
Aug
7131.4° / 13.9°
Sep
7926° / 7.9°
Oct
5117.2° / 0.8°
Nov
159.6° / -5.6°
Dec
53.8° / -10°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.1°C | -10.4°C | 12 mm | 2.8 | 9 h 21 | 5 | Strong coverage |
| February | 4.4°C | -9.5°C | 17 mm | 3.9 | 10 h 28 | 5 | Strong coverage |
| March | 10.5°C | -4.7°C | 33 mm | 4.2 | 11 h 47 | 19 | Strong coverage |
| April | 14.9°C | -0.2°C | 53 mm | 7 | 13 h 19 | 36 | Strong coverage |
| May | 20.2°C | 5.9°C | 83 mm | 9.1 | 14 h 37 | 59 | Strong coverage |
| June | 27.1°C | 11.5°C | 72 mm | 7.4 | 15 h 19 | 74 | Strong coverage |
| July | 31.8°C | 15.2°C | 50 mm | 5.9 | 15 h 02 | 69 | Strong coverage |
| August | 31.4°C | 13.9°C | 42 mm | 5.4 | 13 h 55 | 71 | Strong coverage |
| September | 26°C | 7.9°C | 38 mm | 4.3 | 12 h 26 | 79 | Strong coverage |
| October | 17.2°C | 0.8°C | 35 mm | 4.3 | 10 h 58 | 51 | Strong coverage |
| November | 9.6°C | -5.6°C | 18 mm | 3.6 | 9 h 40 | 15 | Strong coverage |
| December | 3.8°C | -10°C | 16 mm | 3.6 | 9 h 02 | 5 | Strong coverage |
What has changed
Chadron runs +0.7°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
+1.0
Feb
-1.4
Mar
+2.0
Apr
-0.4
May
-1.1
Jun
+0.9
Jul
+0.3
Aug
+0.5
Sep
+2.5
Oct
-0.1
Nov
+2.3
Dec
+1.8
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.1°C30 Jan 1989 | -33.9°C21 Jan 1949 | 37 mm25 Jan 1921 | 61 mm1949 · driest 0 mm in 1952 | 108 |
| February | 26.7°C24 Feb 1895 | -42.2°C7 Feb 1895 | 38 mm26 Feb 2000 | 62 mm2000 · driest 0 mm in 1989 | 110 |
| March | 35.6°C27 Mar 1895 | -32.2°C5 Mar 1989 | 48 mm8 Mar 2016 | 103 mm2019 · driest 0 mm in 1922 | 110 |
| April | 33.9°C20 Apr 1989 | -23.9°C2 Apr 1975 | 76 mm7 Apr 1919 | 146 mm1927 · driest 6 mm in 1980 | 109 |
| May | 36.7°C23 May 2012 | -8.9°C3 May 1954 | 65 mm20 May 1988 | 189 mm2011 · driest 1 mm in 1966 | 108 |
| June | 41.7°C19 Jun 1989 | -3.3°C2 Jun 1969 | 91 mm16 Jun 1921 | 264 mm1947 · driest 4 mm in 2000 | 108 |
| July | 43.3°C11 Jul 1939 | 2.8°C13 Jul 2008 | 53 mm25 Jul 1923 | 141 mm1997 · driest 2 mm in 1936 | 106 |
| August | 45.6°C26 Aug 1894 | -0.6°C23 Aug 2015 | 52 mm5 Aug 1920 | 130 mm1915 · driest 0 mm in 1991 | 107 |
| September | 43.3°C6 Sep 1894 | -9.4°C25 Sep 1926 | 112 mm18 Sep 1986 | 148 mm1986 · driest 0 mm in 1916 | 108 |
| October | 35.0°C5 Oct 1947 | -25.0°C26 Oct 2020 | 47 mm9 Oct 2011 | 92 mm1998 · driest 0 mm in 1989 | 107 |
| November | 30.0°C2 Nov 1894 | -28.9°C13 Nov 1986 | 38 mm5 Nov 1922 | 95 mm1922 · driest 0 mm in 1989 | 107 |
| December | 25.6°C14 Dec 1894 | -40.0°C22 Dec 1989 | 26 mm10 Dec 1915 | 49 mm2019 · driest 0 mm in 1988 | 110 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 26 | <1 | 5 |
| March | 1 | 0 | 25 | <1 | 4 |
| April | 3 | <1 | 16 | 2 | 3 |
| May | 8 | 2 | 4 | 3 | <1 |
| June | 21 | 10 | <1 | 3 | 0 |
| July | 29 | 21 | 0 | 2 | 0 |
| August | 28 | 20 | 0 | 1 | 0 |
| September | 18 | 10 | 2 | 1 | 0 |
| October | 6 | 1 | 14 | 1 | 2 |
| November | <1 | 0 | 25 | <1 | 3 |
| December | 0 | 0 | 29 | <1 | 5 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 83); on 2011–2025 it is June (75). 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 | <1% | 10% | <1% | 3% | -1.5–6.7°C |
| February | 2% | 12% | <1% | 7% | 0.2–9.1°C |
| March | 12% | 15% | 2% | 10% | 5.4–13.9°C |
| April | 28% | 23% | 5% | 24% | 12.1–19.0°C |
| May | 48% | 27% | 8% | 32% | 18.0–23.7°C |
| June | 71% | 25% | 8% | 27% | 24.0–30.3°C |
| July | 80% | 20% | 5% | 17% | 29.5–34.7°C |
| August | 85% | 14% | 4% | 10% | 28.9–33.4°C |
| September | 74% | 15% | 4% | 11% | 22.9–28.6°C |
| October | 45% | 13% | 3% | 7% | 14.7–21.6°C |
| November | 9% | 11% | 1% | 6% | 5.7–13.4°C |
| December | <1% | 10% | <1% | 5% | 0.0–7.4°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 5694163
- NOAA station
- USC00251575 · CHADRON 3SW
- Station distance
- 4.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 26 usable years
- Daylight
- Calculated from latitude 42.83°, 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.