- Book online with TUI & save up to 7% on holidays
- FREE child places available for select holidays
- Pay £0 deposits with direct debit & spread the cost
Napa weather in August 2025
Expect 82°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Napa in August. Check more long-term weather averages for Napa in August before you book your next holiday to California in 2025/2026.
- 8282°F max day temperature
- 11 hours of sunshine per day
- 11 day with some rainfall
- 5454°F min night temperature
- 1414 hours of daylight per day
- MModerate heat & humidity
- 0.10.1 inches of monthly rainfall
- 99 (Very High) UV index
More about Napa
- Overview
- Best time to visit
- Weather by month
- 5-day weather forecast
- Destinations
- Travel advice
- Deals & discounts
Napa by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for California
The August weather guide for California (Napa) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
More about California
How hot is it in Napa in August?
Daytime temperatures usually reach 82°F in Napa in August with moderate heat and humidity, falling to 54°F at night.
How sunny is it in Napa in August?
There are normally 11 hours of bright sunshine each day in Napa in August - that's 79% of daylight hours.
Does it ever rain in Napa in August?
There is usually 1 day with some rain in Napa in August and the average monthly rainfall is 0.1 inches.
Napa August sunrise & sunset times
Browse the sunrise and sunset times for Napa in August 2025. Select a month to view Napa sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Friday, 1st August 2025 | 05:12 | 19:18 |
Saturday, 16th August 2025 | 05:25 | 19:01 |
Sunday, 31st August 2025 | 05:38 | 18:40 |
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- TUI
- Jet2holidays
- easyJet holidays
- Love Holidays
- Black Friday sales
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport