The best times to visit Suisun City 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.
Suisun City Travel Guide
Other Suisun City Travel Info
Weather in Suisun City
Average temperatures in Suisun City 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 Suisun City, 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.
Suisun City Temperatures (Fahrenheit)
Suisun City Temperatures (Celsius)
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.
Suisun City Perceived Temperature (F)
Suisun City Perceived Temperature (C)
Average Suisun City 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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Suisun City 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 Suisun City? 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 Suisun City.
Snow on the Ground
The graph below shows the average snow on the ground in Suisun City (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Suisun City 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 Suisun City 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 Suisun City.
The graph below shows wind speed (max and average) in knots.
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|
Is it Safe to Travel to Suisun City?
Our best data indicates this area is generally safe. As of Oct 07, 2019 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 Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Suisun City, 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 Suisun City 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
Overall Suisun City 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 fairly slow for tourism, which makes it a good time for those looking for deals.
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 Suisun City, 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 second busiest during these months due to the weather, so hotels may be slightly higher priced.
Winter (December through February)
Weather is too cold this time of year in Suisun City 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 the slowest with tourists.