UTC Offset
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Suisun, United States Snapshot 2026
Where is Suisun?
Suisun, United States
- Continent
- Americas
- Country
- United States
- City
- Suisun
- Population
- 28.1K
- Elevation
- 2 m
- Coordinates
- 38.24°, -122.04°
Suisun is a city in United States with a population of approximately 28.1K. Average temperatures range from 6°C (43°F) in January to 31°C (89°F) in August. The best time to visit is June, July, August, September, October.
Time in Suisun right now
Open full time & time zone page 14:12 12
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Suisun
Daylight in Suisun today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 49m
Climate normals for Suisun
Long-term monthly averages based on historical data.
January
Fair 
February
Fair March
Good April
Good May
Excellent June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 15°C / 6°C | 13°C / 4°C | 10days (125 mm) Wet | 6.3h Fair | 81% Humid | 2.9 Moderate | Fair | View Details |
| February | 17°C / 7°C | 15°C / 4°C | 7days (96 mm) Good | 8.2h Good | 71% Muggy | 3.7 Moderate | Fair | View Details |
| March | 18°C / 8°C | 16°C / 6°C | 10days (95 mm) Wet | 9.2h Good | 73% Muggy | 5.2 High | Good | View Details |
| April | 22°C / 9°C | 21°C / 8°C | 4days (26 mm) Good | 10.9h Excellent | 66% Muggy | 6.7 High | Good | View Details |
| May | 26°C / 12°C | 25°C / 10°C | 3days (15 mm) Excellent | 12.6h Excellent | 60% Moderate | 7.8 Very High | Excellent | View Details |
| June best | 30°C / 14°C | 30°C / 13°C | 0days (1 mm) Excellent | 13.5h Excellent | 56% Moderate | 8.2 Very High | Excellent | View Details |
| July best | 31°C / 14°C | 31°C / 14°C | 0days (0 mm) Excellent | 13.4h Excellent | 60% Moderate | 8.3 Very High | Excellent | View Details |
| August best | 31°C / 15°C | 32°C / 15°C | 0days (0 mm) Excellent | 12.4h Excellent | 61% Muggy | 7.7 Very High | Excellent | View Details |
| September best | 30°C / 15°C | 30°C / 15°C | 0days (4 mm) Excellent | 11.2h Excellent | 61% Muggy | 6.5 High | Excellent | View Details |
| October best | 26°C / 13°C | 24°C / 12°C | 3days (26 mm) Excellent | 9.5h Good | 59% Moderate | 5 Moderate | Excellent | View Details |
| November | 19°C / 9°C | 17°C / 7°C | 5days (52 mm) Good | 7.7h Good | 70% Muggy | 3.3 Moderate | Good | View Details |
| December | 15°C / 7°C | 13°C / 4°C | 9days (97 mm) Wet | 6.1h Fair | 79% Humid | 2.6 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 15°C / 6°C . Feb: 17°C / 7°C . Mar: 18°C / 8°C . Apr: 22°C / 9°C . May: 26°C / 12°C . Jun: 30°C / 14°C . Jul: 31°C / 14°C . Aug: 31°C / 15°C . Sep: 30°C / 15°C . Oct: 26°C / 13°C . Nov: 19°C / 9°C . Dec: 15°C / 7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 125 mm. Feb: 96 mm. Mar: 95 mm. Apr: 26 mm. May: 15 mm. Jun: 1 mm. Jul: 0 mm. Aug: 0 mm. Sep: 4 mm. Oct: 26 mm. Nov: 52 mm. Dec: 97 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 81%. Feb: 71%. Mar: 73%. Apr: 66%. May: 60%. Jun: 56%. Jul: 60%. Aug: 61%. Sep: 61%. Oct: 59%. Nov: 70%. Dec: 79%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 15 km/h . Mar: 16 km/h . Apr: 16 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 17 km/h . Sep: 15 km/h . Oct: 13 km/h . Nov: 11 km/h . Dec: 12 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 11°C . Feb: 12°C . Mar: 13°C . Apr: 17°C . May: 20°C . Jun: 22°C . Jul: 22°C . Aug: 23°C . Sep: 22°C . Oct: 20°C . Nov: 16°C . Dec: 12°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 3. Dec: UV 3.
Frequently Asked Questions
Suisun has a population of approximately 28.1K.
The best months to visit Suisun are June, July, August, September, October, when temperatures are pleasant and rainfall is lower.
Suisun receives approximately 537mm of rainfall annually across 51 rainy days.
Suisun is located in United States, in the Americas region.
Suisun sits at an elevation of 2 m (7 ft) above sea level.