The best times to visit Fountain Valley for ideal weather are

March 12th to November 25th

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



Other Fountain Valley Travel Info

Weather in Fountain Valley


Average temperatures in Fountain Valley vary somewhat. Considering humidity, temperatures feel very enjoyable all year with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 88th 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 Fountain Valley, the hottest months are September, August, and then July. See average monthly temperatures below. The warmest time of year is generally late August to early September where highs are regularly around 85.8°F (29.9°C) with temperatures rarely dropping below 68°F (20°C) at night.

Fountain Valley Temperatures (Fahrenheit)


Fountain Valley 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.

Fountain Valley Perceived Temperature (F)


Fountain Valley Perceived Temperature (C)



Average Fountain Valley 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 69.9 57.8 47.7
Feb 68 57.6 49.1
Mar 70.6 60.3 52.3
Apr 71.8 62 54.6
May 73.4 64.7 58.5
Jun 74.9 67 62
Jul 79.2 70.8 65.6
Aug 82 72.6 66.6
Sep 83.1 72.6 66
Oct 79.7 68.8 60.9
Nov 74.5 62.7 53.4
Dec 67.1 56.6 47.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 21.1 14.3 8.7
Feb 20 14.2 9.5
Mar 21.4 15.7 11.3
Apr 22.1 16.7 12.6
May 23 18.2 14.7
Jun 23.8 19.4 16.7
Jul 26.2 21.6 18.7
Aug 27.8 22.6 19.2
Sep 28.4 22.6 18.9
Oct 26.5 20.4 16.1
Nov 23.6 17.1 11.9
Dec 19.5 13.7 8.7



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Fountain Valley are June, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late January with an average of 2 days of significant precipitation the week of January 22nd.

When can you find snow in Fountain Valley? 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.

Chance of Precipitation

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

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 11% 0 1.6
Feb 12% 0 1.3
Mar 5% 0 0.8
Apr 4% 0 0.4
May 2% 0 0.2
Jun 0% 0 0
Jul 2% 0 0.1
Aug 0% 0 0
Sep 1% 0 0.3
Oct 3% 0 0.5
Nov 7% 0 0.8
Dec 16% 0 2.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 11 0 4.1
Feb 12 0 3.3
Mar 5 0 2
Apr 4 0 1
May 2 0 0.5
Jun 0 0 0
Jul 2 0 0.3
Aug 0 0 0
Sep 1 0 0.8
Oct 3 0 1.3
Nov 7 0 2
Dec 16 0 6.9


Humidity and Wind

Fountain Valley has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is January (44.8% relative humidity), and the most humid month is June (61.3%).

Wind in Fountain Valley is usually extremely calm. The windiest month is May, followed by June and July. May’s average wind speed of around 5.1 knots (5.8 MPH or 9.4 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early May where average top sustained speeds reach 11.6 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 3.1 Barely noticeable 9.4 Gentle breeze
Feb 3.5 Barely noticeable 9.9 Gentle breeze
Mar 4 Light breeze 10.5 Gentle breeze
Apr 4.7 Light breeze 11.1 Significant breeze
May 5.1 Light breeze 10.9 Gentle breeze
Jun 5 Light breeze 10.5 Gentle breeze
Jul 4.7 Light breeze 10.3 Gentle breeze
Aug 4.3 Light breeze 9.8 Gentle breeze
Sep 3.8 Barely noticeable 9.4 Gentle breeze
Oct 3.3 Barely noticeable 9.3 Gentle breeze
Nov 2.7 Barely noticeable 8.7 Gentle breeze
Dec 2.9 Barely noticeable 9 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 44.8%
Feb 52.4%
Mar 52.2%
Apr 51.5%
May 55.9%
Jun 61.3%
Jul 61.3%
Aug 58.3%
Sep 56.7%
Oct 52.5%
Nov 47.7%
Dec 51.8%


Is it Safe to Travel to Fountain Valley?

Our best data indicates this area is generally safe. As of Dec 04, 2023 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. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Fountain Valley, CA, US is July, followed by June and May. 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 Fountain Valley in November. 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 37.9 in November means 37.9% of the tourists vs. July.



Overall Fountain Valley Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 75.8°F (24.3°C) and 68.8°F (20.4°C) with warmer temperatures in the later months. Rain is rare with 1 to 2 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 comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in Fountain Valley, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 85°F (29.4°C) and 71.9°F (22.2°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: 0 to 2 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 somewhat cool this time of year in Fountain Valley to be enjoyable for warm weather travelers. The average high during this season is between 71.9°F (22.2°C) and 65.7°F (18.7°C). On average, it rains or snows a smalll amount: 3 to 5 times per month. These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Fountain Valley, CA, US