Temecula, CA weather in September
Expect hot, dry weather in Temecula in September, with highs near 93°F and lows near 61°F. Rain falls on about 1 day. Plan outdoor time for mornings and evenings.
- Normal high
- 93°F
- Normal low
- 61°F
- Wet days
- 1
- 0.2 in total
- Muggy days
- 1
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 97°F | 88°F |
| Normal low | 64°F | 58°F |
| Chance of a wet day | 2% | 3% |
| Sunrise / sunset | 6:22 am / 7:14 pm | 6:42 am / 6:34 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 am61°Fdew point 52°F
- 9 am77°Fdew point 52°F
- Noon88°Fdew point 48°F
- 3 pm89°Fdew point 50°F
- 6 pm79°Fdew point 52°F
- 9 pm69°Fdew point 54°F
NOAA hourly normals (local standard time) from March AFB (29 mi away); average wind 5 mph; clear or few clouds in 82% of daytime hours, mostly cloudy or overcast in 12%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 30
- Hot dayshigh 90°F or more23 of 30
- Muggy daysdaily mean dew point 65°F or more1 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 0.2 in; a dry September brings about 0.0 in and a wet one about 0.08 in (25th and 75th percentiles). Days with half an inch or more are rare.
How September varies from year to year
- Warmest September, 1991-20202012: average high 100°F
- Coolest September1998: average high 89°F
- Wettest September2005: 1.6 in
- Driest September1992: no measurable precipitation
- Highest reading117°F (September 6, 2020)
- Lowest reading45°F (September 22, 2007)
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 | 93°F | 83°F |
| Normal low | 65°F | 61°F | 54°F |
| Wet days | 1 | 1 | 2 |
| Comfortable days | 0 | 2 | 9 |
| Daylight | 13.4 h | 12.4 h | 11.3 h |
Highs change by -5°F from August and -10°F into October.
Nearby alternatives in September
- Warmer: Palm Springs, CA42 mi · high 102°F · 1 wet day
- Cooler: Oceanside, CA25 mi · high 71°F · 1 wet day
How Temecula ranks in September
- Normal high17th warmest of 378 cities; 4th of 60 in California
- Wet days23rd driest of 378
- Comfortable days274th most of 342
What to pack for Temecula in September
- Light, breathable clothing – highs near 93°F
- Layers – afternoons near 93°F but nights near 61°F
Heating and cooling
September has 2 heating degree days and 367 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How hot is Temecula in September?
The normal high is 93°F and the normal low is 61°F. From 1991 to 2020 the hottest September reading was 117°F (September 6, 2020).
Does it rain a lot in Temecula in September?
About 1 days in September have at least 0.01 in of precipitation, and the normal total is 0.2 in. The wettest September in 1991-2020 was in 2005 (1.7 in); the driest was in 1992, with no measurable precipitation.
Is September a good time to visit Temecula?
September ranks 11th of 12 months on our comfort score for Temecula (40 out of 100). It has about 2 comfortable days and about 23 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Elsinore (USC00042805), 18 mi NW of the city center, 1,268 ft (257 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Fallbrook 5 Ne (USW00053151), 4.5 mi SSW of the city center, 1,140 ft (129 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: March AFB (USW00023119), 29 mi NNW of the city center, 1,516 ft (505 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: March Air Reserve Base (722860-23119), 29 mi NNW of the city center, 1,536 ft (525 ft higher than the city). Hourly observations, 1991-2020.