Monterey weather in September: Monterey, California: normal highs, lows, rain and records for September
Monterey in September has a normal high of 71°F and a normal low of 54°F, a daily mean of 62°F, holding near 71°F all month. Measurable precipitation falls on 2 days in a normal September, 0.07 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 12°C, 2 mm of precipitation in September.
- NOAA stationMonterey Peninsul Airport
- Station IDUSW00023259
- Location36.59°N 121.85°W
- Elevation165 ft (50 m)
- From the center2 miles
- Population29,015
- Jan 62° 43°
- Feb 62° 45°
- Mar 63° 46°
- Apr 63° 47°
- May 65° 50°
- Jun 68° 52°
- Jul 69° 54°
- Aug 70° 55°
- Sep 71° 54°
- Oct 70° 51°
- Nov 65° 46°
- Dec 62° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Monterey in September?
The normal high is 71°F and the normal low 54°F, for a daily mean of 62.4°F. September is 0.1°F cooler than August and 2.1°F warmer than October. September is the 2nd warmest month of the year in Monterey and the 10th wettest. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 60°F and 65°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 9%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 71°F | 55°F | 4% | 1% |
| September 8 | 71°F | 54°F | 4% | 1% |
| September 15 | 71°F | 54°F | 5% | 1% |
| September 22 | 71°F | 53°F | 7% | 2% |
| September 30 | 71°F | 53°F | 9% | 2% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 8, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 71°F | 55°F | 4% | 1% | 13 h |
| September 2 | 71°F | 55°F | 4% | 1% | 13 h |
| September 3 | 71°F | 55°F | 4% | 1% | 13 h |
| September 4 | 71°F | 55°F | 4% | 1% | 12 h 50 min |
| September 5 | 71°F | 54°F | 4% | 1% | 12 h 50 min |
| September 6 | 71°F | 54°F | 4% | 1% | 12 h 50 min |
| September 7 | 71°F | 54°F | 4% | 1% | 12 h 50 min |
| September 8 | 71°F | 54°F | 4% | 1% | 12 h 40 min |
| September 9 | 71°F | 54°F | 5% | 1% | 12 h 40 min |
| September 10 | 71°F | 54°F | 5% | 1% | 12 h 40 min |
| September 11 | 71°F | 54°F | 5% | 1% | 12 h 40 min |
| September 12 | 71°F | 54°F | 5% | 1% | 12 h 40 min |
| September 13 | 71°F | 54°F | 5% | 1% | 12 h 30 min |
| September 14 | 71°F | 54°F | 5% | 1% | 12 h 30 min |
| September 15 | 71°F | 54°F | 5% | 1% | 12 h 30 min |
| September 16 | 71°F | 54°F | 6% | 1% | 12 h 30 min |
| September 17 | 71°F | 54°F | 6% | 1% | 12 h 20 min |
| September 18 | 71°F | 54°F | 6% | 1% | 12 h 20 min |
| September 19 | 71°F | 54°F | 6% | 1% | 12 h 20 min |
| September 20 | 71°F | 54°F | 6% | 1% | 12 h 20 min |
| September 21 | 71°F | 54°F | 7% | 2% | 12 h 10 min |
| September 22 | 71°F | 53°F | 7% | 2% | 12 h 10 min |
| September 23 | 71°F | 53°F | 7% | 2% | 12 h 10 min |
| September 24 | 71°F | 53°F | 7% | 2% | 12 h 10 min |
| September 25 | 71°F | 53°F | 8% | 2% | 12 h 10 min |
| September 26 | 71°F | 53°F | 8% | 2% | 12 h |
| September 27 | 71°F | 53°F | 8% | 2% | 12 h |
| September 28 | 71°F | 53°F | 9% | 2% | 12 h |
| September 29 | 71°F | 53°F | 9% | 2% | 12 h |
| September 30 | 71°F | 53°F | 9% | 2% | 11 h 50 min |
- Normal high
- 71°FSeptember average
- Normal low
- 54°FSeptember average
- Precipitation
- 0.07 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 13
- Days at 80°F or more
- 3
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023259; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Monterey in September?
On a given September day the chance of 0.01 inch or more is 6% on average, highest around September 30 (9%). In all, 0.07 in falls on 2 days of a normal September.
In a normal September in Monterey, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023259.
What are the records for September in Monterey?
The warmest September temperature on this station's record (since 1968) is 103°F, on September 1, 2017; the coldest is 42°F, on September 14, 1970. The wettest September brought 1.94 in (1976).
The September mean against the 1991-2020 normal of 62.4°F: 2021 64.3°F (+1.9), 2022 64.2°F (+1.8), 2023 62.1°F (−0.3), 2024 61.5°F (−0.9), 2025 65.1°F (+2.7), 2026 62.5°F (+0.1). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.3°F | +1.9°F | 0.01 in |
| 2022 | 64.2°F | +1.8°F | 1.06 in |
| 2023 | 62.1°F | −0.3°F | 0.06 in |
| 2024 | 61.5°F | −0.9°F | 0.06 in |
| 2025 | 65.1°F | +2.7°F | 0.23 in |
| 2026 | 62.5°F | +0.1°F | 0.00 in |
Source: records: ACIS, station USW00023259; recent months: ACIS, station USW00023259. Records and recent months use complete months only.
How does September in Monterey 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; Monterey's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.