Fairfield, CA weather in October
Fairfield is mild and dry in October: highs average 78°F and nights drop to about 52°F. Rain falls on about 3 days. A good month for most outdoor plans.
- Normal high
- 78°F
- Normal low
- 52°F
- Wet days
- 3
- 1.1 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 84°F | 72°F |
| Normal low | 55°F | 49°F |
| Chance of a wet day | 6% | 13% |
| Sunrise / sunset | 7:04 am / 6:51 pm | 7:33 am / 6:10 pm |
| Daylight | 11.8 h | 10.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical October day
- 6 am53°Fdew point 46°F
- 9 am64°Fdew point 47°F
- Noon74°Fdew point 45°F
- 3 pm77°Fdew point 44°F
- 6 pm67°Fdew point 46°F
- 9 pm60°Fdew point 47°F
NOAA hourly normals (local standard time) from Travis AFB (6 mi away); average wind 10 mph; clear or few clouds in 75% of daytime hours, mostly cloudy or overcast in 18%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F17 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow3 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 1.1 in; a dry October brings about 0.1 in and a wet one about 1.9 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How October varies from year to year
- Warmest October, 1991-20202020: average high 85°F
- Coolest October2016: average high 73°F
- Wettest October2009: 5.7 in
- Driest October2002: no measurable precipitation
- Highest reading101°F (October 1, 2001)
- Lowest reading32°F (October 6, 2011)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 87°F | 78°F | 66°F |
| Normal low | 57°F | 52°F | 45°F |
| Wet days | 1 | 3 | 7 |
| Comfortable days | 6 | 17 | 16 |
| Daylight | 12.4 h | 11.2 h | 10.1 h |
Highs change by -9°F from September and -12°F into November.
Nearby alternatives in October
- Cooler: San Francisco, CA39 mi · high 70°F · 4 wet days
How Fairfield ranks in October
- Normal high123rd warmest of 378 cities; 34th of 60 in California
- Wet days44th driest of 378
- Comfortable days33rd most of 340
What to pack for Fairfield in October
- Layers – afternoons near 78°F but nights near 52°F
Heating and cooling
October has 69 heating degree days and 77 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Fairfield in October?
The normal high is 78°F and the normal low is 52°F. From 1991 to 2020 the hottest October reading was 101°F (most recently on October 1, 2001).
Does it rain a lot in Fairfield in October?
About 3 days in October have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest October in 1991-2020 was in 2009 (5.7 in); the driest was in 2002, with no measurable precipitation.
Is October a good time to visit Fairfield?
October ranks 3rd of 12 months on our comfort score for Fairfield (69 out of 100). It has about 17 comfortable days and about 3 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Fairfield (USC00042934), 2.3 mi NW of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Travis AFB (USW00023202), 5.9 mi ENE of the city center, 59 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Travis Air Force Base (745160-23202), 5.9 mi ENE of the city center, 62 ft . Hourly observations, 1991-2020.