The best times to visit Fairfield for ideal weather are

April 16th to November 4th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Weather in Fairfield


Average temperatures in Fairfield vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 48th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Fairfield, the hottest months are July, August, and then September. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 93.1°F (33.9°C) with temperatures rarely dropping below 58.7°F (14.8°C) at night.

Fairfield Temperatures (Fahrenheit)


Fairfield Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Fairfield Perceived Temperature (F)


Fairfield Perceived Temperature (C)



Average Fairfield Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 58.6 45.4 35.4
Feb 62.3 50.2 40.4
Mar 67.4 54.2 43.2
Apr 72.7 57.6 45.4
May 79 62.8 50.2
Jun 86.6 68.5 55.1
Jul 89.4 70.1 57.1
Aug 89.6 69.9 57.1
Sep 88.7 69.4 55.5
Oct 79.2 62.9 50.2
Nov 66.9 52.8 41.3
Dec 57.4 46.1 37.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 14.8 7.4 1.9
Feb 16.8 10.1 4.7
Mar 19.7 12.3 6.2
Apr 22.6 14.2 7.4
May 26.1 17.1 10.1
Jun 30.3 20.3 12.8
Jul 31.9 21.2 13.9
Aug 32 21.1 13.9
Sep 31.5 20.8 13.1
Oct 26.2 17.2 10.1
Nov 19.4 11.6 5.2
Dec 14.1 7.8 2.8


Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Fairfield are August, September, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid June. For example, on the week of June 11th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 2 days of significant precipitation the week of December 17th.

When can you find snow in Fairfield? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chanceof Precipitation

The graph below shows the % chance of rainy and snowy days in Fairfield.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Fairfield (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 15% 0 2.5
Feb 23% 0 3.3
Mar 15% 0 2.4
Apr 13% 0 1.6
May 10% 0 1
Jun 5% 0 1.4
Jul 6% 0 1.1
Aug 2% 0 0.6
Sep 3% 0 0.6
Oct 7% 0 1.6
Nov 12% 0 1.6
Dec 22% 0 3.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 15 0 6.4
Feb 23 0 8.4
Mar 15 0 6.1
Apr 13 0 4.1
May 10 0 2.5
Jun 5 0 3.6
Jul 6 0 2.8
Aug 2 0 1.5
Sep 3 0 1.5
Oct 7 0 4.1
Nov 12 0 4.1
Dec 22 0 9.1


Humidity and Wind

Fairfield has some very humid months, with other moderately humid months on the other side of the year. The least humid month is September (44.8% relative humidity), and the most humid month is January (73.6%).

Wind in Fairfield is usually moderate. The windiest month is July, followed by August and June. July’s average wind speed of around 16.9 knots (19.5 MPH or 31.3 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early August where average top sustained speeds reach 23.7 knots, which is considered a strong breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Fairfield.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 5.7 Light breeze 12.5 Significant breeze
Feb 7.3 Gentle breeze 14.8 Significant breeze
Mar 8.3 Gentle breeze 15.9 Significant breeze
Apr 10.3 Gentle breeze 18.1 Strong breeze
May 13.5 Significant breeze 20.7 Significant breeze
Jun 14.7 Significant breeze 21.8 Strong breeze
Jul 16.9 Significant breeze 22.8 Significant breeze
Aug 15.8 Significant breeze 22.1 Very strong breeze
Sep 12 Significant breeze 18.9 Significant breeze
Oct 8.2 Gentle breeze 15.3 Significant breeze
Nov 6.2 Light breeze 12.8 Significant breeze
Dec 5.9 Light breeze 12.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 73.6%
Feb 72.6%
Mar 65.8%
Apr 56.5%
May 48.8%
Jun 45.7%
Jul 48.5%
Aug 48.9%
Sep 44.8%
Oct 50.6%
Nov 65.5%
Dec 73.6%


Is it Safe to Travel to Fairfield?

Our best data indicates this area is generally safe. As of Dec 07, 2018 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


The Busiest and Least Crowded Months

The busiest month for tourism in Fairfield, CA, US is July, followed by June and August. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Fairfield in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 36.3 in December means 36.3% of the tourists vs. July.

Overall Fairfield Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 80.3°F (26.8°C) and 63°F (17.2°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 5 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the least precipitation with 0 to 2 days of precipitation per month. June – August is the busiest season for tourism in Fairfield, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 91.1°F (32.8°C) and 61.7°F (16.5°C), which will feel comfortable given the humidity and wind. It rains or snows a normal amount: 1 to 4 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Fairfield to be enjoyable for warm weather travelers. The average high during this season is between 63.5°F (17.5°C) and 56.1°F (13.4°C). On average, it rains or snows a fair amount: 5 to 7 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Fairfield, CA, US

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