Fresno weather in September: Fresno, California: normal highs, lows, rain and records for September
Fresno in September has a normal high of 91°F and a normal low of 63°F, a daily mean of 77°F, falling from 95°F on the 1st to 86°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.05 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 17°C, 1 mm of precipitation in September.
- NOAA stationFresno Yosemite Int'l
- Station IDUSW00093193
- Location36.78°N 119.72°W
- Elevation333 ft (102 m)
- From the center4 miles
- Population550,105
- Jan 55° 41°
- Feb 61° 43°
- Mar 68° 47°
- Apr 74° 51°
- May 83° 58°
- Jun 91° 64°
- Jul 98° 69°
- Aug 97° 68°
- Sep 91° 63°
- Oct 79° 55°
- Nov 65° 45°
- Dec 55° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fresno in September?
The normal high is 91°F and the normal low 63°F, for a daily mean of 77.1°F. September is 5.1°F cooler than August and 10.4°F warmer than October. September is the 4th warmest month of the year in Fresno and the 10th wettest. Across the month the normal high falls 9°F, from 95°F on September 1 to 86°F on September 30. From one year to the next September's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 75°F and 79°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 4%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 95°F | 66°F | 1% | 0% |
| September 8 | 93°F | 65°F | 2% | 0% |
| September 15 | 91°F | 64°F | 2% | 1% |
| September 22 | 89°F | 62°F | 3% | 1% |
| September 30 | 86°F | 60°F | 4% | 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 | 95°F | 66°F | 1% | 0% | 13 h |
| September 2 | 94°F | 66°F | 1% | 0% | 13 h |
| September 3 | 94°F | 66°F | 1% | 0% | 13 h |
| September 4 | 94°F | 66°F | 1% | 0% | 12 h 50 min |
| September 5 | 94°F | 66°F | 1% | 0% | 12 h 50 min |
| September 6 | 94°F | 65°F | 1% | 0% | 12 h 50 min |
| September 7 | 93°F | 65°F | 1% | 0% | 12 h 50 min |
| September 8 | 93°F | 65°F | 2% | 0% | 12 h 40 min |
| September 9 | 93°F | 65°F | 2% | 0% | 12 h 40 min |
| September 10 | 93°F | 65°F | 2% | 0% | 12 h 40 min |
| September 11 | 92°F | 65°F | 2% | 0% | 12 h 40 min |
| September 12 | 92°F | 64°F | 2% | 0% | 12 h 40 min |
| September 13 | 92°F | 64°F | 2% | 1% | 12 h 30 min |
| September 14 | 92°F | 64°F | 2% | 1% | 12 h 30 min |
| September 15 | 91°F | 64°F | 2% | 1% | 12 h 30 min |
| September 16 | 91°F | 64°F | 2% | 1% | 12 h 30 min |
| September 17 | 91°F | 63°F | 3% | 1% | 12 h 20 min |
| September 18 | 90°F | 63°F | 3% | 1% | 12 h 20 min |
| September 19 | 90°F | 63°F | 3% | 1% | 12 h 20 min |
| September 20 | 90°F | 63°F | 3% | 1% | 12 h 20 min |
| September 21 | 89°F | 62°F | 3% | 1% | 12 h 10 min |
| September 22 | 89°F | 62°F | 3% | 1% | 12 h 10 min |
| September 23 | 89°F | 62°F | 3% | 1% | 12 h 10 min |
| September 24 | 88°F | 62°F | 3% | 1% | 12 h 10 min |
| September 25 | 88°F | 61°F | 3% | 1% | 12 h 10 min |
| September 26 | 87°F | 61°F | 4% | 1% | 12 h |
| September 27 | 87°F | 61°F | 4% | 1% | 12 h |
| September 28 | 87°F | 60°F | 4% | 1% | 12 h |
| September 29 | 86°F | 60°F | 4% | 1% | 12 h |
| September 30 | 86°F | 60°F | 4% | 1% | 11 h 50 min |
- Normal high
- 91°FSeptember average
- Normal low
- 63°FSeptember average
- Precipitation
- 0.05 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
- 28
- Sunshine
- 97%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093193; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fresno in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 30 (4%). In all, 0.05 in falls on 1 days of a normal September.
In a normal September in Fresno, 20 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093193.
How humid and windy is Fresno in September?
At 3 p.m. the normal temperature is 86°F with 25% relative humidity and a dew point of 46°F; at 6 a.m. it is 60°F with 68% humidity. The wind averages 5.3 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 60°F | 50°F | 68% | 3.6 mph | 68% |
| 9 a.m. | 71°F | 50°F | 47% | 5.7 mph | 75% |
| noon | 81°F | 49°F | 32% | 5.1 mph | 74% |
| 3 p.m. | 86°F | 46°F | 25% | 6.4 mph | 70% |
| 6 p.m. | 81°F | 47°F | 31% | 6.6 mph | 68% |
| 9 p.m. | 73°F | 50°F | 44% | 5.9 mph | 79% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093193. 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 Fresno?
The warmest September temperature on Fresno's official record (since 1887) is 114°F, on September 6, 2022; the coldest is 37°F, on September 30, 1950. The wettest September brought 1.78 in (1904).
The September mean against the 1991-2020 normal of 77.1°F: 2021 79.6°F (+2.5), 2022 82.2°F (+5.1), 2023 76.2°F (−0.9), 2024 80.0°F (+2.9), 2025 79.1°F (+2.0), 2026 76.5°F (−0.5). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 79.6°F | +2.5°F | 0.00 in |
| 2022 | 82.2°F | +5.1°F | 0.06 in |
| 2023 | 76.2°F | −0.9°F | 0.00 in |
| 2024 | 80.0°F | +2.9°F | 0.02 in |
| 2025 | 79.1°F | +2.0°F | 0.81 in |
| 2026 | 76.5°F | −0.5°F | 0.00 in |
Source: records: ACIS, NWS threaded record FATthr; recent months: ACIS, station USW00093193. Records and recent months use complete months only.
How does September in Fresno 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; Fresno's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.