Lancaster weather in September: Lancaster, California: normal highs, lows, rain and records for September
Lancaster in September has a normal high of 91°F and a normal low of 57°F, a daily mean of 74°F, falling from 96°F on the 1st to 86°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.12 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 14°C, 3 mm of precipitation in September.
- NOAA stationLancaster
- Station IDUSW00003159
- Location34.74°N 118.21°W
- Elevation2,338 ft (713 m)
- Population167,426
- Jan 59° 31°
- Feb 62° 35°
- Mar 67° 40°
- Apr 73° 45°
- May 82° 53°
- Jun 91° 62°
- Jul 98° 67°
- Aug 98° 65°
- Sep 91° 57°
- Oct 80° 46°
- Nov 67° 35°
- Dec 58° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lancaster in September?
The normal high is 91°F and the normal low 57°F, for a daily mean of 74.2°F. September is 7.1°F cooler than August and 11.3°F warmer than October. September is the 4th warmest month of the year in Lancaster and the 9th wettest. Across the month the normal high falls 10°F, from 96°F on September 1 to 86°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 72°F and 77°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 3%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 96°F | 61°F | 1% | 0% |
| September 8 | 94°F | 60°F | 2% | 1% |
| September 15 | 92°F | 57°F | 2% | 1% |
| September 22 | 89°F | 55°F | 2% | 1% |
| September 30 | 86°F | 52°F | 3% | 1% |
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 | 96°F | 61°F | 1% | 0% | 13 h |
| September 2 | 96°F | 61°F | 1% | 0% | 12 h 50 min |
| September 3 | 95°F | 61°F | 1% | 0% | 12 h 50 min |
| September 4 | 95°F | 61°F | 1% | 0% | 12 h 50 min |
| September 5 | 95°F | 60°F | 2% | 0% | 12 h 50 min |
| September 6 | 95°F | 60°F | 2% | 0% | 12 h 50 min |
| September 7 | 94°F | 60°F | 2% | 0% | 12 h 40 min |
| September 8 | 94°F | 60°F | 2% | 1% | 12 h 40 min |
| September 9 | 94°F | 59°F | 2% | 1% | 12 h 40 min |
| September 10 | 93°F | 59°F | 2% | 1% | 12 h 40 min |
| September 11 | 93°F | 59°F | 2% | 1% | 12 h 40 min |
| September 12 | 93°F | 58°F | 2% | 1% | 12 h 30 min |
| September 13 | 93°F | 58°F | 2% | 1% | 12 h 30 min |
| September 14 | 92°F | 58°F | 2% | 1% | 12 h 30 min |
| September 15 | 92°F | 57°F | 2% | 1% | 12 h 30 min |
| September 16 | 92°F | 57°F | 2% | 1% | 12 h 20 min |
| September 17 | 91°F | 57°F | 2% | 1% | 12 h 20 min |
| September 18 | 91°F | 56°F | 2% | 1% | 12 h 20 min |
| September 19 | 90°F | 56°F | 2% | 1% | 12 h 20 min |
| September 20 | 90°F | 56°F | 2% | 1% | 12 h 20 min |
| September 21 | 90°F | 55°F | 2% | 1% | 12 h 10 min |
| September 22 | 89°F | 55°F | 2% | 1% | 12 h 10 min |
| September 23 | 89°F | 54°F | 2% | 1% | 12 h 10 min |
| September 24 | 89°F | 54°F | 3% | 1% | 12 h 10 min |
| September 25 | 88°F | 54°F | 3% | 1% | 12 h 10 min |
| September 26 | 88°F | 53°F | 3% | 1% | 12 h |
| September 27 | 87°F | 53°F | 3% | 1% | 12 h |
| September 28 | 87°F | 53°F | 3% | 1% | 12 h |
| September 29 | 87°F | 52°F | 3% | 1% | 12 h |
| September 30 | 86°F | 52°F | 3% | 1% | 11 h 50 min |
- Normal high
- 91°FSeptember average
- Normal low
- 57°FSeptember average
- Precipitation
- 0.12 inmonth total
- Days with precipitation
- 10.01 inch or more
- Days at 90°F or more
- 20
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 27
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003159; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lancaster in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 30 (3%). In all, 0.12 in falls on 1 days of a normal September.
In a normal September in Lancaster, 20 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003159.
How humid and windy is Lancaster in September?
At 3 p.m. the normal temperature is 85°F with 16% relative humidity and a dew point of 34°F; at 6 a.m. it is 54°F with 48% humidity. The wind averages 9.3 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 54°F | 34°F | 48% | 5.6 mph | 95% |
| 9 a.m. | 72°F | 37°F | 28% | 6.0 mph | 94% |
| noon | 83°F | 34°F | 17% | 11.2 mph | 94% |
| 3 p.m. | 85°F | 34°F | 16% | 14.1 mph | 92% |
| 6 p.m. | 75°F | 37°F | 25% | 12.5 mph | 95% |
| 9 p.m. | 67°F | 37°F | 33% | 10.4 mph | 95% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003159. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Lancaster?
The warmest September temperature on Lancaster's official record (since 1945) is 113°F, on September 2, 2022; the coldest is 27°F, on September 26, 1948. The wettest September brought 1.82 in (1963).
The September mean against the 1991-2020 normal of 74.2°F: 2021 76.3°F (+2.1), 2022 79.4°F (+5.2), 2023 72.8°F (−1.4), 2024 76.0°F (+1.8), 2025 75.3°F (+1.1), 2026 74.3°F (+0.1). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +2.1°F | 0.00 in |
| 2022 | 79.4°F | +5.2°F | 0.44 in |
| 2023 | 72.8°F | −1.4°F | 0.00 in |
| 2024 | 76.0°F | +1.8°F | 0.00 in |
| 2025 | 75.3°F | +1.1°F | 0.06 in |
| 2026 | 74.3°F | +0.1°F | 0.32 in |
Source: records: ACIS, NWS threaded record WJFthr; recent months: ACIS, station USW00003159. Records and recent months use complete months only.
How does September in Lancaster 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; Lancaster's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Lancaster in August98°F by day, 65°F at night
- Lancaster in October80°F by day, 46°F at night
- Lancaster 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