Martinez weather in September: Martinez, California: normal highs, lows, rain and records for September
Martinez in September has a normal high of 84°F and a normal low of 50°F, a daily mean of 67°F, falling from 86°F on the 1st to 81°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.06 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 10°C, 2 mm of precipitation in September.
- NOAA stationMartinez Water Treatment Plant
- Station IDUSC00045378
- Location38.01°N 122.11°W
- Elevation40 ft (12 m)
- Population37,006
- Jan 56° 35°
- Feb 61° 37°
- Mar 66° 40°
- Apr 71° 43°
- May 78° 46°
- Jun 85° 50°
- Jul 88° 51°
- Aug 87° 51°
- Sep 84° 50°
- Oct 76° 46°
- Nov 64° 39°
- Dec 57° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Martinez in September?
The normal high is 84°F and the normal low 50°F, for a daily mean of 66.9°F. September is 2.0°F cooler than August and 6.1°F warmer than October. September is the 4th warmest month of the year in Martinez and the 10th wettest. Across the month the normal high falls 5°F, from 86°F on September 1 to 81°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 65°F and 69°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 5%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 86°F | 50°F | 1% | 0% |
| September 8 | 86°F | 50°F | 1% | 0% |
| September 15 | 85°F | 50°F | 2% | 1% |
| September 22 | 83°F | 49°F | 3% | 1% |
| September 30 | 81°F | 48°F | 5% | 2% |
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 | 86°F | 50°F | 1% | 0% | 13 h |
| September 2 | 86°F | 50°F | 1% | 0% | 13 h |
| September 3 | 86°F | 50°F | 1% | 0% | 13 h |
| September 4 | 86°F | 50°F | 1% | 0% | 13 h |
| September 5 | 86°F | 50°F | 1% | 0% | 12 h 50 min |
| September 6 | 86°F | 50°F | 1% | 0% | 12 h 50 min |
| September 7 | 86°F | 50°F | 1% | 0% | 12 h 50 min |
| September 8 | 86°F | 50°F | 1% | 0% | 12 h 50 min |
| September 9 | 86°F | 50°F | 2% | 1% | 12 h 40 min |
| September 10 | 85°F | 50°F | 2% | 1% | 12 h 40 min |
| September 11 | 85°F | 50°F | 2% | 1% | 12 h 40 min |
| September 12 | 85°F | 50°F | 2% | 1% | 12 h 40 min |
| September 13 | 85°F | 50°F | 2% | 1% | 12 h 30 min |
| September 14 | 85°F | 50°F | 2% | 1% | 12 h 30 min |
| September 15 | 85°F | 50°F | 2% | 1% | 12 h 30 min |
| September 16 | 84°F | 50°F | 2% | 1% | 12 h 30 min |
| September 17 | 84°F | 50°F | 3% | 1% | 12 h 20 min |
| September 18 | 84°F | 50°F | 3% | 1% | 12 h 20 min |
| September 19 | 84°F | 50°F | 3% | 1% | 12 h 20 min |
| September 20 | 84°F | 49°F | 3% | 1% | 12 h 20 min |
| September 21 | 83°F | 49°F | 3% | 1% | 12 h 10 min |
| September 22 | 83°F | 49°F | 3% | 1% | 12 h 10 min |
| September 23 | 83°F | 49°F | 4% | 1% | 12 h 10 min |
| September 24 | 83°F | 49°F | 4% | 2% | 12 h 10 min |
| September 25 | 82°F | 49°F | 4% | 2% | 12 h 10 min |
| September 26 | 82°F | 49°F | 4% | 2% | 12 h |
| September 27 | 82°F | 49°F | 4% | 2% | 12 h |
| September 28 | 82°F | 49°F | 5% | 2% | 12 h |
| September 29 | 82°F | 48°F | 5% | 2% | 12 h |
| September 30 | 81°F | 48°F | 5% | 2% | 11 h 50 min |
- Normal high
- 84°FSeptember average
- Normal low
- 50°FSeptember average
- Precipitation
- 0.06 inmonth total
- Days with precipitation
- 10.01 inch or more
- Days at 90°F or more
- 8
- 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
- 22
- Sunshine
- 93%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00045378; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Martinez in September?
On a given September day the chance of 0.01 inch or more is 3% on average, highest around September 30 (5%). In all, 0.06 in falls on 1 days of a normal September.
In a normal September in Martinez, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00045378.
What are the records for September in Martinez?
The warmest September temperature on this station's record (since 1970) is 108°F, on September 14, 1971; the coldest is 40°F, on September 25, 2005. The wettest September brought 1.23 in (1989).
Source: records: ACIS, station USC00045378. Records and recent months use complete months only.
How does September in Martinez 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; Martinez's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.