Climate Overview
The climate in Hayward is cool. The average annual temperature is 6°C and approximately 957mm of precipitation falls per year. Hayward receives a notable amount of rainfall throughout the year, including during its driest month. Hayward is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -13°C. Snowfall occurs from January to December, with around 195cm accumulating over the season.
Temperature
Hayward has a wide annual temperature range, spanning 40°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 21°C. The coldest month is January, when overnight lows fall to -13°C and the daily average is -10°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 9°C shift in average temperatures.
Precipitation
Hayward is a moderately rainy area, receiving approximately 957mm of precipitation annually, which averages out to around 80mm per month. The wettest month is June, averaging 119mm of rainfall. July and May also tend to see above-average precipitation. The driest month is January, with just 31mm. That's 88mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 195cm accumulating over the season. December typically sees the most snow at around 44cm.
Wind
Hayward is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
4 days until Summer
It is currently spring in Hayward, which began on March 20, 2026. Hayward is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 27°C, while the coldest stretch bottoms out in January near -13°C. Summer is next, beginning on June 21, 2026 — 4 days from now.
Spring
Temperatures range from -6 to 20°C. Precipitation is moderate at around 246mm for the season, averaging 82mm per month. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 14 to 27°C. Rainfall is heavy, totalling around 339mm across the season with a monthly average of 113mm. Winds are generally light, averaging 3km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -3 to 21°C. Precipitation is moderate at around 245mm for the season, averaging 82mm per month. Expect around 38cm of snow accumulation during this period. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -13 to -3°C. Rainfall is relatively light, with around 128mm over the season and a monthly average of 43mm. Expect around 104cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Hayward based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
