Napa, CA weather in June
Napa is warm and dry in June: highs average 82°F and nights drop to about 54°F. There are about 1 day with rain. A great month for outdoor plans.
- Normal high
- 82°F
- Normal low
- 54°F
- Wet days
- 1
- 0.3 in total
- Muggy days
- 0
- dew point 65°F+
How June changes from start to finish
| June 1 | June 30 | |
|---|---|---|
| Normal high | 80°F | 84°F |
| Normal low | 52°F | 55°F |
| Chance of a wet day | 6% | 2% |
| Sunrise / sunset | 5:47 am / 8:26 pm | 5:48 am / 8:36 pm |
| Daylight | 14.7 h | 14.8 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 June day
- 6 am59°Fdew point 51°F
- 9 am71°Fdew point 51°F
- Noon80°Fdew point 51°F
- 3 pm84°Fdew point 51°F
- 6 pm77°Fdew point 51°F
- 9 pm64°Fdew point 51°F
NOAA hourly normals (local standard time) from Travis AFB (19 mi away); average wind 17 mph; clear or few clouds in 82% of daytime hours, mostly cloudy or overcast in 11%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 30
- Hot dayshigh 90°F or more6 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow1 of 30
- Notable rainat least 0.10 in1 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per June, counted from daily records for each year 1991-2020.
Rain in June
Normal precipitation is 0.3 in; a dry June brings about 0.0 in and a wet one about 0.3 in (25th and 75th percentiles). Days with half an inch or more are rare.
How June varies from year to year
- Warmest June, 1991-20202001: average high 86°F
- Coolest June1992: average high 76°F
- Wettest June1992: 1.1 in
- Driest June1996: no measurable precipitation
- Highest reading110°F (June 15, 2000)
- Lowest reading41°F (June 8, 1999)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
June compared with May and July
| May | June | July | |
|---|---|---|---|
| Normal high | 77°F | 82°F | 83°F |
| Normal low | 50°F | 54°F | 56°F |
| Wet days | 4 | 1 | 0 |
| Comfortable days | 21 | 13 | 13 |
| Daylight | 14.3 h | 14.8 h | 14.5 h |
Highs change by +5°F from May and +1°F into July.
Nearby alternatives in June
- Warmer: Sacramento, CA47 mi · high 89°F · 1 wet day
- Cooler: San Francisco, CA37 mi · high 67°F · 2 wet days
How Napa ranks in June
- Normal high204th warmest of 378 cities; 29th of 60 in California
- Wet days52nd driest of 378
- Comfortable days75th most of 340
What to pack for Napa in June
- Layers – afternoons near 82°F but nights near 54°F
- Sunglasses and sunscreen – about 14.8 hours of daylight and highs near 82°F
Heating and cooling
June has 23 heating degree days and 113 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Napa in June?
The normal high is 82°F and the normal low is 54°F. From 1991 to 2020 the hottest June reading was 110°F (June 15, 2000).
Does it rain a lot in Napa in June?
About 1 days in June have at least 0.01 in of precipitation, and the normal total is 0.3 in. The wettest June in 1991-2020 was in 1992 (1.1 in); the driest was in 1996, with no measurable precipitation.
Is June a good time to visit Napa?
June ranks 3rd of 12 months on our comfort score for Napa (73 out of 100). It has about 13 comfortable days and about 6 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall and frost dates: Napa State Hospital (USC00046074), 1.8 mi SE of the city center, 35 ft . NOAA normals and daily records, 1991-2020.
- Snow depth: Fairfield (USC00042934), 12 mi E of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Travis AFB (USW00023202), 19 mi E of the city center, 59 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Napa County Airport (724955-93227), 6.2 mi S of the city center, 15 ft . Hourly observations, 1991-2020.