September
September · June · August
83climate match
United States · 1991–2020
Best time to visit
Big Bear City.
September leads for comfortable weather in Big Bear City: typically 23.7°C by day, 6.2°C at night, with 10 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23.7°C
Typical low6.2°C
Rain in September10 mm
July
July · August · June
64climate match
May
May · September · October
86climate match
The weakest month is January, scoring 5 against September’s 83 — days reach only 8.7°C, 15° below the 24°C the score treats as ideal, and nights drop to -5.1°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
58.7° / -5.1°
Feb
58.7° / -4.9°
Mar
2011.5° / -3.2°
Apr
4114.9° / -1°
May
6319.6° / 2.5°
Jun
8124.8° / 6.1°
Jul
8027.4° / 9.8°
Aug
8126.8° / 9.3°
Sep
8323.7° / 6.2°
Oct
5618.3° / 1.2°
Nov
3112.8° / -2.7°
Dec
58.6° / -5.2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 8.7°C | -5.1°C | 116 mm | 5.8 | 10 h 06 | 5 | Strong coverage |
| February | 8.7°C | -4.9°C | 110 mm | 6.1 | 10 h 54 | 5 | Strong coverage |
| March | 11.5°C | -3.2°C | 62 mm | 4.9 | 11 h 52 | 20 | Strong coverage |
| April | 14.9°C | -1°C | 22 mm | 3 | 13 h | 41 | Strong coverage |
| May | 19.6°C | 2.5°C | 11 mm | 1.6 | 13 h 56 | 63 | Strong coverage |
| June | 24.8°C | 6.1°C | 4 mm | 0.6 | 14 h 26 | 81 | Strong coverage |
| July | 27.4°C | 9.8°C | 15 mm | 2.4 | 14 h 14 | 80 | Strong coverage |
| August | 26.8°C | 9.3°C | 23 mm | 2.2 | 13 h 26 | 81 | Strong coverage |
| September | 23.7°C | 6.2°C | 10 mm | 1.7 | 12 h 21 | 83 | Strong coverage |
| October | 18.3°C | 1.2°C | 20 mm | 1.8 | 11 h 16 | 56 | Strong coverage |
| November | 12.8°C | -2.7°C | 30 mm | 2.6 | 10 h 20 | 31 | Strong coverage |
| December | 8.6°C | -5.2°C | 81 mm | 4.7 | 9 h 53 | 5 | Strong coverage |
What has changed
Big Bear City runs +0.5°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
+0.8
Feb
0.0
Mar
+0.7
Apr
+1.4
May
-0.1
Jun
+0.8
Jul
+0.1
Aug
+0.5
Sep
+0.3
Oct
+0.2
Nov
+0.7
Dec
+1.1
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.7°C3 Jan 1981 | -22.8°C8 Jan 1989 | 239 mm25 Jan 1969 | 632 mm1969 · driest 0 mm in 1972 | 65 |
| February | 22.2°C25 Feb 1986 | -23.3°C28 Feb 1962 | 210 mm14 Feb 2019 | 505 mm1969 · driest 0 mm in 1961 | 64 |
| March | 26.7°C7 Mar 1972 | -22.2°C12 Mar 1969 | 85 mm22 Mar 2023 | 302 mm2023 · driest 0 mm in 1972 | 66 |
| April | 27.8°C30 Apr 1981 | -16.1°C2 Apr 1963 | 55 mm11 Apr 1967 | 201 mm1965 · driest 0 mm in 1977 | 66 |
| May | 30.6°C28 May 2003 | -7.8°C8 May 1964 | 51 mm9 May 1977 | 98 mm1977 · driest 0 mm in 2021 | 66 |
| June | 36.7°C30 Jun 1994 | -5.6°C4 Jun 1963 | 22 mm5 Jun 1993 | 41 mm1972 · driest 0 mm in 2017 | 66 |
| July | 34.4°C15 Jul 1998 | -2.2°C6 Jul 1963 | 46 mm18 Jul 1984 | 129 mm1984 · driest 0 mm in 2000 | 65 |
| August | 33.3°C8 Aug 1981 | -1.7°C25 Aug 1965 | 67 mm20 Aug 2023 | 117 mm2003 · driest 0 mm in 1976 | 65 |
| September | 30.6°C6 Sep 2020 | -7.2°C2 Sep 1964 | 59 mm10 Sep 1976 | 128 mm1976 · driest 0 mm in 2020 | 66 |
| October | 29.4°C5 Oct 1980 | -12.2°C29 Oct 1971 | 83 mm20 Oct 2004 | 112 mm2004 · driest 0 mm in 1988 | 65 |
| November | 23.3°C14 Nov 2021 | -26.1°C19 Nov 1964 | 166 mm23 Nov 1965 | 414 mm1965 · driest 0 mm in 1995 | 66 |
| December | 22.2°C9 Dec 2025 | -25.6°C9 Dec 1960 | 240 mm6 Dec 1966 | 484 mm1966 · driest 0 mm in 1999 | 65 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 3 | 3 |
| February | 0 | 0 | 25 | 3 | 4 |
| March | 0 | 0 | 26 | 2 | 3 |
| April | <1 | 0 | 19 | <1 | 1 |
| May | 4 | 0 | 8 | <1 | <1 |
| June | 16 | 1 | 1 | <1 | <1 |
| July | 25 | 5 | 0 | <1 | 0 |
| August | 25 | 3 | 0 | <1 | 0 |
| September | 12 | <1 | 1 | <1 | 0 |
| October | 1 | 0 | 11 | <1 | <1 |
| November | 0 | 0 | 24 | <1 | 1 |
| December | 0 | 0 | 27 | 2 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 18% | 9% | 19% | 5.6–11.1°C |
| February | <1% | 19% | 9% | 23% | 6.0–12.0°C |
| March | 3% | 18% | 8% | 17% | 7.8–14.4°C |
| April | 16% | 11% | 3% | 7% | 11.0–17.2°C |
| May | 51% | 5% | 1% | 2% | 16.0–22.4°C |
| June | 87% | 2% | <1% | <1% | 21.9–26.4°C |
| July | 92% | 8% | 2% | 5% | 25.8–28.5°C |
| August | 90% | 9% | 3% | 7% | 25.0–27.9°C |
| September | 83% | 6% | 1% | 3% | 21.6–24.8°C |
| October | 43% | 6% | 2% | 3% | 16.0–20.9°C |
| November | 6% | 10% | 5% | 8% | 10.1–15.0°C |
| December | <1% | 14% | 7% | 14% | 6.3–11.6°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 5328152
- NOAA station
- USC00040741 · BIG BEAR LAKE
- Station distance
- 6.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 34.26°, 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.