Weather Guide

United States Average Monthly Weather

Weather score55Mixed annual avg

Best months: July, June, August

Across the year, average daytime temperatures are around 21°C, sunshine averages 7.8h per day, and rainfall totals about 794mm. Sea temperatures average 3°C across the year.

San Francisco, California, United States, United States travel weather guide
Photo by 12019 on Pixabay

Annual weather

Annual averages

Temp

21°C

Rain

794mm

Annual total

Sun

7.8h

Sea

3°C

Weather score

55

Mixed avg

Seasonal climate calendar

TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score

Trip feel

Warm

Average highs sit around 29°C, giving warm days by monthly-average standards.

Showers

Rainfall averages 84mm, so some wet days are possible.

Bright

Sunshine averages 9h per day, so bright days are a strong part of the month.

Cool sea

Sea temperatures average 5°C, so the water can feel cool.

Map

Weather map

Compare United States with nearby places by weather score, rain, sun, temperature, and swim conditions.

Temperature

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August29°C average high

August is one of United States' warmest months, with daytime heat above the yearly average.

Warmest monthsJune to September

This stretch sets the upper range for average daytime heat.

August84mm average rain

August is close to United States' usual rainfall pattern, with little seasonal change across the year.

Driest monthsJanuary to October

Rainfall stays comparatively low through the year.

August9 hours average sun

August is brighter than United States' yearly average, though the strongest sunshine usually sits closer to the peak months.

Brightest monthsMay to August

This stretch has the strongest sunshine in the monthly averages.

Sea temperature

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August5°C average sea

August is one of United States' warmest sea months, when swimming comfort is usually strongest.

Warmest seaJuly to October

Sea temperatures are usually near 4°C in this stretch, so swimming comfort is at its strongest.

Weather score

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August71 weather score

August is one of United States' best weather-score months, combining the strongest overall balance in the yearly averages.

Best weather monthsJune to August

These months have the strongest weather score in the monthly averages.

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