September
September · June · August
80climate match
United States · 1991–2020
Best time to visit
Klein.
September leads for comfortable weather in Klein: typically 25.4°C by day, 6.9°C at night, with 27 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.4°C
Typical low6.9°C
Rain in September27 mm
August
August · July · September
66climate match
May
May · September · October
77climate match
The weakest month is January, scoring 5 against September’s 80 — days reach only 3.3°C, 21° below the 24°C the score treats as ideal, and nights drop to -9.5°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
53.3° / -9.5°
Feb
55.2° / -8.5°
Mar
2211.1° / -4.3°
Apr
4316° / 0.1°
May
6521.3° / 5.3°
Jun
7326.3° / 9.9°
Jul
6632.3° / 13.2°
Aug
6931.4° / 11.8°
Sep
8025.4° / 6.9°
Oct
5016.9° / 1.3°
Nov
148.6° / -4.6°
Dec
53.3° / -9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.3°C | -9.5°C | 10 mm | 2.8 | 8 h 58 | 5 | Strong coverage |
| February | 5.2°C | -8.5°C | 9 mm | 2.5 | 10 h 15 | 5 | Strong coverage |
| March | 11.1°C | -4.3°C | 18 mm | 3.7 | 11 h 45 | 22 | Strong coverage |
| April | 16°C | 0.1°C | 41 mm | 6.2 | 13 h 29 | 43 | Strong coverage |
| May | 21.3°C | 5.3°C | 63 mm | 7.9 | 14 h 58 | 65 | Strong coverage |
| June | 26.3°C | 9.9°C | 75 mm | 8.5 | 15 h 47 | 73 | Strong coverage |
| July | 32.3°C | 13.2°C | 40 mm | 5.6 | 15 h 28 | 66 | Strong coverage |
| August | 31.4°C | 11.8°C | 31 mm | 4 | 14 h 10 | 69 | Strong coverage |
| September | 25.4°C | 6.9°C | 27 mm | 3.9 | 12 h 29 | 80 | Strong coverage |
| October | 16.9°C | 1.3°C | 30 mm | 4.7 | 10 h 49 | 50 | Strong coverage |
| November | 8.6°C | -4.6°C | 11 mm | 2.6 | 9 h 21 | 14 | Strong coverage |
| December | 3.3°C | -9°C | 18 mm | 3.2 | 8 h 36 | 5 | Strong coverage |
What has changed
Klein runs +0.0°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
+0.9
Feb
-3.7
Mar
+1.5
Apr
-0.4
May
-0.6
Jun
+0.7
Jul—
Aug
+0.6
Sep
+1.6
Oct—
Nov
+0.1
Dec
-0.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.1°C22 Jan 1981 | -40.6°C25 Jan 1957 | 19 mm25 Jan 1918 | 48 mm1918 · driest 0 mm in 1941 | 98 |
| February | 23.9°C28 Feb 1932 | -46.7°C15 Feb 1936 | 19 mm2 Feb 1966 | 27 mm1936 · driest 0 mm in 1981 | 98 |
| March | 27.8°C31 Mar 2004 | -36.1°C10 Mar 1932 | 44 mm2 Mar 1967 | 68 mm1967 · driest 0 mm in 2002 | 95 |
| April | 32.8°C20 Apr 1980 | -22.8°C2 Apr 1936 | 50 mm15 Apr 1930 | 116 mm1991 · driest 2 mm in 1919 | 95 |
| May | 37.8°C28 May 1934 | -12.2°C3 May 1954 | 58 mm12 May 1942 | 163 mm2011 · driest 1 mm in 1958 | 96 |
| June | 41.1°C27 Jun 2002 | -0.6°C8 Jun 1979 | 66 mm9 Jun 1968 | 174 mm1967 · driest 9 mm in 1919 | 93 |
| July | 43.9°C14 Jul 2002 | 2.2°C2 Jul 1955 | 60 mm21 Jul 1955 | 204 mm1993 · driest 0 mm in 1933 | 93 |
| August | 42.2°C5 Aug 1961 | -1.1°C25 Aug 1992 | 86 mm23 Aug 2014 | 172 mm2014 · driest 0 mm in 2001 | 94 |
| September | 38.9°C1 Sep 1983 | -9.4°C30 Sep 1985 | 49 mm12 Sep 1978 | 109 mm1978 · driest 0 mm in 1938 | 97 |
| October | 35.0°C3 Oct 1943 | -23.3°C25 Oct 1919 | 76 mm22 Oct 1975 | 111 mm1975 · driest 0 mm in 1934 | 95 |
| November | 25.0°C4 Nov 1976 | -37.8°C16 Nov 1959 | 16 mm1 Nov 1957 | 45 mm1919 · driest 0 mm in 1949 | 94 |
| December | 21.1°C27 Dec 1980 | -42.2°C24 Dec 1983 | 76 mm10 Dec 2000 | 183 mm2000 · driest 0 mm in 1943 | 94 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | <1 | 3 |
| February | 0 | 0 | 25 | <1 | 3 |
| March | <1 | 0 | 24 | <1 | 2 |
| April | 3 | <1 | 15 | 1 | <1 |
| May | 9 | 2 | 4 | 2 | <1 |
| June | 18 | 7 | <1 | 3 | 0 |
| July | 28 | 22 | 0 | 1 | 0 |
| August | 27 | 21 | <1 | <1 | 0 |
| September | 16 | 7 | 2 | <1 | 0 |
| October | 4 | <1 | 12 | <1 | <1 |
| November | 0 | 0 | 24 | <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% | 4% | -2.4–8.0°C |
| February | 1% | 8% | <1% | 4% | -0.1–9.5°C |
| March | 7% | 10% | 1% | 5% | 5.7–14.3°C |
| April | 29% | 16% | 2% | 13% | 12.5–19.7°C |
| May | 52% | 24% | 6% | 28% | 18.0–24.5°C |
| June | 69% | 27% | 7% | 29% | 23.4–29.7°C |
| July | 83% | 17% | 3% | 12% | 29.1–34.1°C |
| August | 86% | 14% | 3% | 9% | 28.1–33.6°C |
| September | 73% | 14% | 3% | 10% | 21.3–27.8°C |
| October | 41% | 12% | 2% | 7% | 13.8–20.8°C |
| November | 5% | 8% | <1% | 3% | 5.6–13.2°C |
| December | <1% | 9% | <1% | 4% | -1.3–7.8°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 5660972
- NOAA station
- USC00247214 · ROUNDUP
- Station distance
- 4 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 26 usable years
- Daylight
- Calculated from latitude 46.40°, 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.