South Lake Tahoe weather in September: South Lake Tahoe, California: normal highs, lows, rain and records for September
South Lake Tahoe in September has a normal high of 73°F and a normal low of 35°F, a daily mean of 54°F, falling from 77°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 2 days in a normal September, 0.28 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 2°C, 7 mm of precipitation in September.
- NOAA stationSouth Lake Tahoe Airport
- Station IDUSW00093230
- Location38.90°N 119.99°W
- Elevation6,314 ft (1,925 m)
- Population21,225
- Jan 43° 18°
- Feb 43° 19°
- Mar 48° 24°
- Apr 53° 28°
- May 62° 33°
- Jun 72° 38°
- Jul 80° 43°
- Aug 80° 41°
- Sep 73° 35°
- Oct 62° 29°
- Nov 51° 23°
- Dec 43° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is South Lake Tahoe in September?
The normal high is 73°F and the normal low 35°F, for a daily mean of 54.4°F. September is 6.0°F cooler than August and 8.7°F warmer than October. September is the 4th warmest month of the year in South Lake Tahoe and the 12th wettest. Across the month the normal high falls 9°F, from 77°F on September 1 to 68°F on September 30. From one year to the next September's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 53°F and 56°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 13%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 77°F | 38°F | 5% | 2% |
| September 8 | 76°F | 37°F | 7% | 2% |
| September 15 | 74°F | 36°F | 9% | 3% |
| September 22 | 71°F | 34°F | 10% | 5% |
| September 30 | 68°F | 32°F | 13% | 6% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 77°F | 38°F | 5% | 2% | 13 h |
| September 2 | 77°F | 38°F | 5% | 2% | 13 h |
| September 3 | 77°F | 38°F | 6% | 2% | 13 h |
| September 4 | 77°F | 38°F | 6% | 2% | 13 h |
| September 5 | 77°F | 37°F | 6% | 2% | 12 h 50 min |
| September 6 | 76°F | 37°F | 6% | 2% | 12 h 50 min |
| September 7 | 76°F | 37°F | 6% | 2% | 12 h 50 min |
| September 8 | 76°F | 37°F | 7% | 2% | 12 h 50 min |
| September 9 | 76°F | 37°F | 7% | 2% | 12 h 50 min |
| September 10 | 75°F | 37°F | 7% | 3% | 12 h 40 min |
| September 11 | 75°F | 36°F | 8% | 3% | 12 h 40 min |
| September 12 | 75°F | 36°F | 8% | 3% | 12 h 40 min |
| September 13 | 75°F | 36°F | 8% | 3% | 12 h 40 min |
| September 14 | 74°F | 36°F | 8% | 3% | 12 h 30 min |
| September 15 | 74°F | 36°F | 9% | 3% | 12 h 30 min |
| September 16 | 74°F | 35°F | 9% | 4% | 12 h 30 min |
| September 17 | 73°F | 35°F | 9% | 4% | 12 h 30 min |
| September 18 | 73°F | 35°F | 9% | 4% | 12 h 20 min |
| September 19 | 73°F | 35°F | 10% | 4% | 12 h 20 min |
| September 20 | 72°F | 35°F | 10% | 4% | 12 h 20 min |
| September 21 | 72°F | 34°F | 10% | 4% | 12 h 20 min |
| September 22 | 71°F | 34°F | 10% | 5% | 12 h 10 min |
| September 23 | 71°F | 34°F | 11% | 5% | 12 h 10 min |
| September 24 | 71°F | 34°F | 11% | 5% | 12 h 10 min |
| September 25 | 70°F | 34°F | 11% | 5% | 12 h 10 min |
| September 26 | 70°F | 33°F | 12% | 6% | 12 h |
| September 27 | 70°F | 33°F | 12% | 6% | 12 h |
| September 28 | 69°F | 33°F | 12% | 6% | 12 h |
| September 29 | 69°F | 33°F | 12% | 6% | 12 h |
| September 30 | 68°F | 32°F | 13% | 6% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 35°FSeptember average
- Precipitation
- 0.28 inmonth total
- Days with precipitation
- 20.01 inch or more
- Nights at 32°F or colder
- 10
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 23
- Days at 80°F or more
- 7
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093230; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in South Lake Tahoe in September?
On a given September day the chance of 0.01 inch or more is 9% on average, highest around September 30 (13%). In all, 0.28 in falls on 2 days of a normal September.
In a normal September in South Lake Tahoe, 10 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093230.
What are the records for September in South Lake Tahoe?
The warmest September temperature on this station's record (since 1968) is 94°F, on September 5, 1988; the coldest is 19°F, on September 25, 1984. The wettest September brought 1.83 in (2014).
The September mean against the 1991-2020 normal of 54.4°F: 2021 56.1°F (+1.7), 2022 57.4°F (+3.0), 2023 53.4°F (−1.0), 2024 55.5°F (+1.1), 2025 55.8°F (+1.4), 2026 53.4°F (−1.0). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.1°F | +1.7°F | 0.10 in |
| 2022 | 57.4°F | +3.0°F | 1.19 in |
| 2023 | 53.4°F | −1.0°F | 1.25 in |
| 2024 | 55.5°F | +1.1°F | 0.58 in |
| 2025 | 55.8°F | +1.4°F | 0.24 in |
| 2026 | 53.4°F | −1.0°F | 0.00 in |
Source: records: ACIS, station USW00093230; recent months: ACIS, station USW00093230. Records and recent months use complete months only.
How does September in South Lake Tahoe compare across California?
Across the 219 places PlainClimate covers in California, September normal highs run from 64°F in Eureka to 104°F in Brawley; South Lake Tahoe's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- South Lake Tahoe in August80°F by day, 41°F at night
- South Lake Tahoe in October62°F by day, 29°F at night
- South Lake Tahoe through the yearEvery month, frost dates, records and recent years
- California in SeptemberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Septembernormal high 104°F