Climate averages 1991–2020
Santa Maria, United States weather
in September.
A warm, very dry month: the 2nd warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Santa Maria, United States: daytime highs average 26.2°C and nights cool to about 15.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 1.1 mm of rain on fewer than one day, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Santa Barbara (90 km away). In September its highs average 29.6°C, 3.3°C warmer than Santa Maria, United States, with 2.3 mm of rain.
Among the 498 cities listed in the United States, Santa Maria, United States ranks joint 268th of 498 for the warmest September highs and 2nd of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Santa Maria, United States is 0.7°C cooler than that mean.
From September to October, average highs fall by 2.1°C to 24.2°C, and monthly rainfall rises from 1.1 mm to 19 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Santa Maria, United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.1°C7.2°C | 7.2°C | 96 | 7.2 | 10.110 h |
| February | 17.1°C7.5°C | 7.5°C | 92 | 7.9 | 10.911 h |
| March | 18.4°C8.6°C | 8.6°C | 72 | 6.3 | 11.912 h |
| April | 20.0°C9.7°C | 9.7°C | 26 | 3.3 | 13.013 h |
| May | 21.9°C11.7°C | 11.7°C | 11 | 1.5 | 14.014 h |
| June | 24.3°C14.0°C | 14.0°C | 1.6 | 0.4 | 14.514 h |
| July | 25.8°C16.3°C | 16.3°C | 0.8 | 0.2 | 14.314 h |
| August | 26.6°C16.6°C | 16.6°C | 0.3 | 0.1 | 13.513 h |
| September, selected | 26.2°C15.7°C | 15.7°C | 1.1 | 0.4 | 12.412 h |
| October | 24.2°C13.2°C | 13.2°C | 19 | 1.8 | 11.311 h |
| November | 20.2°C9.7°C | 9.7°C | 35 | 3.7 | 10.410 h |
| December | 16.8°C7.1°C | 7.1°C | 71 | 6.1 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Santa Barbara in SeptemberUnited States · 90 kmHigh 29.6°C · Low 18.8°C · 2.3 mm rain
- Ventura in SeptemberUnited States · 129 kmHigh 25.9°C · Low 17.5°C · 3.1 mm rain
- Bakersfield in SeptemberUnited States · 137 kmHigh 31.8°C · Low 17.9°C · 1.0 mm rain
- Oxnard in SeptemberUnited States · 143 kmHigh 24.3°C · Low 17.2°C · 3.1 mm rain
- Simi Valley in SeptemberUnited States · 169 kmHigh 29.5°C · Low 17.6°C · 3.9 mm rain
- Thousand Oaks in SeptemberUnited States · 170 kmHigh 28.4°C · Low 17.7°C · 3.9 mm rain
- Valencia, United States in SeptemberUnited States · 176 kmHigh 31.3°C · Low 17.5°C · 4.4 mm rain
- Santa Clarita in SeptemberUnited States · 184 kmHigh 31.1°C · Low 17.4°C · 4.4 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Santa Maria) is explained once on the Santa Maria, United States year overview and on the Sources, method and limits page.