Blythe weather in September: Blythe, California: normal highs, lows, rain and records for September
Blythe in September has a normal high of 102°F and a normal low of 74°F, a daily mean of 88°F, falling from 106°F on the 1st to 97°F by the 30th. Measurable precipitation falls on 2 days in a normal September, 0.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 39°C and low of 23°C, 8 mm of precipitation in September.
- NOAA stationBlythe Airport
- Station IDUSW00023158
- Location33.62°N 114.71°W
- Elevation395 ft (120 m)
- Population17,320
- Jan 68° 43°
- Feb 72° 46°
- Mar 80° 52°
- Apr 87° 57°
- May 96° 65°
- Jun 105° 73°
- Jul 109° 82°
- Aug 108° 82°
- Sep 102° 74°
- Oct 90° 61°
- Nov 77° 49°
- Dec 66° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Blythe in September?
The normal high is 102°F and the normal low 74°F, for a daily mean of 88.0°F. September is 6.7°F cooler than August and 12.6°F warmer than October. September is the 4th warmest month of the year in Blythe and the 6th wettest. Across the month the normal high falls 9°F, from 106°F on September 1 to 97°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 86°F and 90°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 6%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 106°F | 79°F | 6% | 2% |
| September 8 | 105°F | 77°F | 6% | 2% |
| September 15 | 103°F | 75°F | 5% | 2% |
| September 22 | 100°F | 72°F | 4% | 2% |
| September 30 | 97°F | 68°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 | 106°F | 79°F | 6% | 2% | 12 h 50 min |
| September 2 | 106°F | 79°F | 6% | 2% | 12 h 50 min |
| September 3 | 106°F | 79°F | 6% | 2% | 12 h 50 min |
| September 4 | 106°F | 78°F | 6% | 2% | 12 h 50 min |
| September 5 | 106°F | 78°F | 6% | 2% | 12 h 50 min |
| September 6 | 105°F | 78°F | 6% | 2% | 12 h 40 min |
| September 7 | 105°F | 77°F | 6% | 2% | 12 h 40 min |
| September 8 | 105°F | 77°F | 6% | 2% | 12 h 40 min |
| September 9 | 104°F | 77°F | 6% | 2% | 12 h 40 min |
| September 10 | 104°F | 76°F | 6% | 2% | 12 h 40 min |
| September 11 | 104°F | 76°F | 6% | 2% | 12 h 30 min |
| September 12 | 104°F | 76°F | 6% | 2% | 12 h 30 min |
| September 13 | 103°F | 75°F | 5% | 2% | 12 h 30 min |
| September 14 | 103°F | 75°F | 5% | 2% | 12 h 30 min |
| September 15 | 103°F | 75°F | 5% | 2% | 12 h 30 min |
| September 16 | 102°F | 74°F | 5% | 2% | 12 h 20 min |
| September 17 | 102°F | 74°F | 5% | 2% | 12 h 20 min |
| September 18 | 101°F | 73°F | 5% | 2% | 12 h 20 min |
| September 19 | 101°F | 73°F | 5% | 2% | 12 h 20 min |
| September 20 | 101°F | 72°F | 4% | 2% | 12 h 20 min |
| September 21 | 100°F | 72°F | 4% | 2% | 12 h 10 min |
| September 22 | 100°F | 72°F | 4% | 2% | 12 h 10 min |
| September 23 | 99°F | 71°F | 4% | 2% | 12 h 10 min |
| September 24 | 99°F | 71°F | 4% | 2% | 12 h 10 min |
| September 25 | 99°F | 70°F | 4% | 2% | 12 h 10 min |
| September 26 | 98°F | 70°F | 4% | 1% | 12 h |
| September 27 | 98°F | 69°F | 4% | 1% | 12 h |
| September 28 | 97°F | 69°F | 4% | 1% | 12 h |
| September 29 | 97°F | 68°F | 4% | 1% | 12 h |
| September 30 | 97°F | 68°F | 4% | 1% | 11 h 50 min |
- Normal high
- 102°FSeptember average
- Normal low
- 74°FSeptember average
- Precipitation
- 0.32 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 29
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 30
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023158; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Blythe in September?
On a given September day the chance of 0.01 inch or more is 5% on average, highest around September 1 (6%). In all, 0.32 in falls on 2 days of a normal September.
In a normal September in Blythe, 29 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023158.
How humid and windy is Blythe in September?
At 3 p.m. the normal temperature is 96°F with 15% relative humidity and a dew point of 41°F; at 6 a.m. it is 70°F with 36% humidity. The wind averages 6.6 mph, most often from the south in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 70°F | 42°F | 36% | 5.2 mph | 96% |
| 9 a.m. | 84°F | 44°F | 24% | 6.1 mph | 94% |
| noon | 94°F | 42°F | 17% | 7.6 mph | 95% |
| 3 p.m. | 96°F | 41°F | 15% | 8.9 mph | 92% |
| 6 p.m. | 90°F | 42°F | 19% | 7.1 mph | 95% |
| 9 p.m. | 82°F | 40°F | 23% | 7.0 mph | 97% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023158. 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 Blythe?
The warmest September temperature on this station's record (since 1948) is 121°F, on September 1, 1950; the coldest is 53°F, on September 26, 1971. The wettest September brought 2.14 in (1976).
The September mean against the 1991-2020 normal of 88.0°F: 2021 89.6°F (+1.6), 2022 90.7°F (+2.7), 2023 86.5°F (−1.5), 2024 90.3°F (+2.3), 2025 86.7°F (−1.3), 2026 89.0°F (+1.0). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 89.6°F | +1.6°F | 0.03 in |
| 2022 | 90.7°F | +2.7°F | 0.10 in |
| 2023 | 86.5°F | −1.5°F | 0.77 in |
| 2024 | 90.3°F | +2.3°F | 0.00 in |
| 2025 | 86.7°F | −1.3°F | 0.39 in |
| 2026 | 89.0°F | +1.0°F | 0.37 in |
Source: records: ACIS, station USW00023158; recent months: ACIS, station USW00023158. Records and recent months use complete months only.
How does September in Blythe 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; Blythe's is 102°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.