Fresno, CA weather in September
September in Fresno: hot and dry. Highs 91°F, lows 63°F, rain on about 1 day.
- Normal high
- 91°F
- Normal low
- 63°F
- Wet days
- 1
- 0.05 in total
- Muggy days
- 0
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 95°F | 86°F |
| Normal low | 66°F | 60°F |
| Chance of a wet day | 1% | 4% |
| Sunrise / sunset | 6:30 am / 7:27 pm | 6:53 am / 6:44 pm |
| Daylight | 13.0 h | 11.8 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 am63°Fdew point 52°F
- 9 am75°Fdew point 52°F
- Noon85°Fdew point 50°F
- 3 pm90°Fdew point 47°F
- 6 pm86°Fdew point 48°F
- 9 pm77°Fdew point 51°F
NOAA hourly normals (local standard time) from Fresno Yosemite Intl Airport (4 mi away); average wind 6 mph; clear or few clouds in 76% of daytime hours, mostly cloudy or overcast in 11%.
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 0.05 in; a dry September brings about 0.0 in and a wet one about 0.04 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 97°F
- Coolest September2007: average high 87°F
- Wettest September2000: 0.3 in
- Driest September1991: no measurable precipitation
- Highest reading109°F (September 2, 2017)
- Lowest reading49°F (September 30, 2009)
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 | 97°F | 91°F | 79°F |
| Normal low | 68°F | 63°F | 55°F |
| Wet days | 0 | 1 | 2 |
| Comfortable days | 0 | 3 | 15 |
| Daylight | 13.5 h | 12.4 h | 11.2 h |
Highs change by -6°F from August and -12°F into October.
Nearby alternatives in September
- Warmer: Furnace Creek, CA162 mi · high 108°F · 1 wet day
- Cooler: Yosemite Valley, CA70 mi · high 83°F · 2 wet days
How Fresno ranks in September
- Normal high38th warmest of 378 cities; 16th of 60 in California
- Wet days18th driest of 378
- Comfortable days246th most of 342
What to pack for Fresno in September
- Light, breathable clothing – highs near 91°F
- Layers – afternoons near 91°F but nights near 63°F
Heating and cooling
September has 2 heating degree days and 364 cooling degree days (base 65°F), 8% of the year's total heating and cooling demand.
Questions
How hot is Fresno in September?
The normal high is 91°F and the normal low is 63°F. From 1991 to 2020 the hottest September reading was 109°F (September 2, 2017).
Does it rain a lot in Fresno in September?
About 1 days in September have at least 0.01 in of precipitation, and the normal total is 0.05 in. The wettest September in 1991-2020 was in 2000 (0.3 in); the driest was in 1991, with no measurable precipitation.
Is September a good time to visit Fresno?
September ranks 10th of 12 months on our comfort score for Fresno (43 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, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Fresno Yosemite Intl Airport (USW00093193), 3.7 mi NE of the city center, 333 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Fresno Yosemite International Airport (723890-93193), 3.7 mi NE of the city center, 334 ft . Hourly observations, 1991-2020.