Lancaster, CA weather in September
September in Lancaster: hot and dry. Highs 91°F, lows 57°F, rain on about 1 day. Midday heat is the main thing to plan around.
- Normal high
- 91°F
- Normal low
- 57°F
- Wet days
- 1
- 0.1 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 96°F | 86°F |
| Normal low | 61°F | 52°F |
| Chance of a wet day | 1% | 3% |
| Sunrise / sunset | 6:25 am / 7:19 pm | 6:46 am / 6:38 pm |
| Daylight | 12.9 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical September day
- 6 am59°Fdew point 37°F
- 9 am77°Fdew point 39°F
- Noon88°Fdew point 36°F
- 3 pm90°Fdew point 37°F
- 6 pm81°Fdew point 40°F
- 9 pm72°Fdew point 40°F
NOAA hourly normals (local standard time) from Lancaster Wm J Fox Fld (5 mi away); average wind 10 mph; clear or few clouds in 94% of daytime hours, mostly cloudy or overcast in 5%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F3 of 30
- Hot dayshigh 90°F or more20 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow1 of 30
- Notable rainat least 0.10 in0 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 0.1 in; a dry September brings about 0.0 in and a wet one about 0.02 in (25th and 75th percentiles). Days with half an inch or more are rare.
How September varies from year to year
- Warmest September, 1991-20202020: average high 98°F
- Coolest September1998: average high 83°F
- Wettest September1997: 0.9 in
- Driest September1992: no measurable precipitation
- Highest reading112°F (September 6, 2020)
- Lowest reading37°F (September 28, 2013)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 98°F | 91°F | 80°F |
| Normal low | 65°F | 57°F | 46°F |
| Wet days | 0 | 1 | 2 |
| Comfortable days | 0 | 3 | 13 |
| Daylight | 13.4 h | 12.4 h | 11.3 h |
Highs change by -7°F from August and -11°F into October.
Nearby alternatives in September
- Warmer: Palm Springs, CA109 mi · high 102°F · 1 wet day
- Cooler: West Covina, CA45 mi · high 83°F · 1 wet day
How Lancaster ranks in September
- Normal high27th warmest of 378 cities; 10th of 60 in California
- Wet days8th driest of 378
- Comfortable days237th most of 342
What to pack for Lancaster in September
- Light, breathable clothing – highs near 91°F
- Layers – afternoons near 91°F but nights near 57°F
Heating and cooling
September has 9 heating degree days and 283 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Lancaster in September?
The normal high is 91°F and the normal low is 57°F. From 1991 to 2020 the hottest September reading was 112°F (September 6, 2020).
Does it rain a lot in Lancaster in September?
About 1 days in September have at least 0.01 in of precipitation, and the normal total is 0.1 in. The wettest September in 1991-2020 was in 1997 (0.9 in); the driest was in 1992, with no measurable precipitation.
Is September a good time to visit Lancaster?
September ranks 10th of 12 months on our comfort score for Lancaster (44 out of 100). It has about 3 comfortable days and about 20 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Lancaster Wm J Fox Fld (USW00003159), 5.2 mi NW of the city center, 2,338 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Palmdale (USC00046624), 8.0 mi SSE of the city center, 2,612 ft (260 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: General William J. Fox Airfield Airport (723816-03159), 5.2 mi NW of the city center, 2,338 ft . Hourly observations, 1991-2020.