September
September · May · October
78climate match
United States · 1991–2020
Best time to visit
Bentley.
September leads for comfortable weather in Bentley: typically 28.2°C by day, 14.8°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high28.2°C
Typical low14.8°C
Rain in September77 mm
August
August · September · July
70climate match
October
October · April · May
85climate match
The weakest month is January, scoring 5 against September’s 78 — days reach only 5.5°C, 18° below the 24°C the score treats as ideal, and nights drop to -6.6°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
55.5° / -6.6°
Feb
128.2° / -4.6°
Mar
3614.2° / 0.7°
Apr
6019.5° / 6°
May
7624.7° / 12.3°
Jun
5530.6° / 18°
Jul
4533.4° / 20.6°
Aug
5232.5° / 19.5°
Sep
7828.2° / 14.8°
Oct
7020.9° / 7.5°
Nov
3613.2° / 0.5°
Dec
76.7° / -4.7°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 5.5°C | -6.6°C | 21 mm | 3 | 9 h 48 | 5 | Strong coverage |
| February | 8.2°C | -4.6°C | 31 mm | 3.7 | 10 h 44 | 12 | Strong coverage |
| March | 14.2°C | 0.7°C | 60 mm | 5.7 | 11 h 50 | 36 | Strong coverage |
| April | 19.5°C | 6°C | 74 mm | 6.4 | 13 h 07 | 60 | Strong coverage |
| May | 24.7°C | 12.3°C | 122 mm | 8.2 | 14 h 12 | 76 | Strong coverage |
| June | 30.6°C | 18°C | 130 mm | 7.6 | 14 h 46 | 55 | Strong coverage |
| July | 33.4°C | 20.6°C | 108 mm | 6.8 | 14 h 33 | 45 | Strong coverage |
| August | 32.5°C | 19.5°C | 98 mm | 6.8 | 13 h 37 | 52 | Strong coverage |
| September | 28.2°C | 14.8°C | 77 mm | 5.3 | 12 h 23 | 78 | Strong coverage |
| October | 20.9°C | 7.5°C | 66 mm | 5.6 | 11 h 09 | 70 | Strong coverage |
| November | 13.2°C | 0.5°C | 42 mm | 4 | 10 h 04 | 36 | Strong coverage |
| December | 6.7°C | -4.7°C | 30 mm | 3.9 | 9 h 33 | 7 | Strong coverage |
What has changed
Bentley runs +0.4°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
+1.5
Feb
-0.3
Mar
+0.7
Apr
-0.5
May
-0.3
Jun
+0.8
Jul
-0.5
Aug
-0.5
Sep
+1.5
Oct
-0.3
Nov
+0.8
Dec
+1.9
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C24 Jan 1981 | -28.9°C4 Jan 1947 | 49 mm4 Jan 1946 | 141 mm1949 · driest 0 mm in 1923 | 126 |
| February | 29.4°C23 Feb 1918 | -33.3°C13 Feb 1905 | 57 mm24 Feb 2020 | 157 mm1911 · driest 0 mm in 1904 | 125 |
| March | 33.9°C21 Mar 1916 | -21.7°C3 Mar 1960 | 109 mm19 Mar 1984 | 285 mm1973 · driest 1 mm in 1910 | 125 |
| April | 36.1°C29 Apr 1910 | -12.2°C3 Apr 1936 | 101 mm28 Apr 1976 | 228 mm1945 · driest 5 mm in 1980 | 128 |
| May | 39.4°C29 May 1913 | -5.0°C3 May 1903 | 113 mm17 May 1908 | 350 mm2019 · driest 3 mm in 1994 | 126 |
| June | 44.4°C25 Jun 1911 | 4.4°C4 Jun 1897 | 146 mm9 Jun 1923 | 352 mm1965 · driest 7 mm in 1911 | 125 |
| July | 47.2°C18 Jul 1936 | 6.1°C13 Jul 1975 | 145 mm4 Jul 1958 | 302 mm1993 · driest 0 mm in 1984 | 126 |
| August | 46.1°C12 Aug 1936 | 6.1°C26 Aug 1910 | 144 mm26 Aug 1960 | 380 mm1927 · driest 1 mm in 1970 | 126 |
| September | 42.2°C3 Sep 1947 | -1.7°C29 Sep 1916 | 192 mm15 Sep 1969 | 261 mm1945 · driest 0 mm in 1956 | 127 |
| October | 36.7°C4 Oct 1898 | -12.2°C30 Oct 1917 | 100 mm10 Oct 1985 | 205 mm2000 · driest 0 mm in 1904 | 127 |
| November | 31.1°C3 Nov 1909 | -20.0°C13 Nov 1940 | 136 mm1 Nov 1998 | 219 mm1998 · driest 0 mm in 1904 | 127 |
| December | 27.2°C24 Dec 1955 | -28.9°C22 Dec 1989 | 66 mm4 Dec 1944 | 100 mm1913 · driest 0 mm in 1950 | 126 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | <1 | 2 |
| February | <1 | 0 | 23 | 1 | 2 |
| March | 2 | 0 | 15 | 2 | <1 |
| April | 7 | 1 | 5 | 3 | <1 |
| May | 16 | 5 | <1 | 4 | 0 |
| June | 27 | 18 | 0 | 4 | 0 |
| July | 30 | 25 | 0 | 3 | 0 |
| August | 30 | 23 | 0 | 3 | 0 |
| September | 22 | 13 | 0 | 2 | 0 |
| October | 9 | 2 | 3 | 2 | <1 |
| November | <1 | 0 | 15 | 1 | <1 |
| December | 0 | 0 | 27 | 1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 1% | 10% | 2% | 6% | 0.8–8.7°C |
| February | 7% | 13% | 3% | 9% | 3.3–13.2°C |
| March | 23% | 17% | 6% | 15% | 10.4–18.0°C |
| April | 46% | 22% | 8% | 22% | 17.0–22.6°C |
| May | 63% | 28% | 12% | 33% | 22.5–27.0°C |
| June | 74% | 26% | 13% | 28% | 28.0–33.0°C |
| July | 80% | 20% | 9% | 17% | 31.1–36.7°C |
| August | 80% | 20% | 9% | 18% | 30.4–36.3°C |
| September | 77% | 20% | 9% | 17% | 25.7–31.8°C |
| October | 59% | 16% | 7% | 14% | 18.9–24.8°C |
| November | 17% | 12% | 4% | 8% | 10.0–16.2°C |
| December | 1% | 11% | 3% | 5% | 3.3–9.8°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 4268156
- NOAA station
- USC00145744 · NEWTON
- Station distance
- 20.8 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 37.89°, 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.