Hayward Weather in December

December in Hayward averages 14°C (57°F) during the day and 5°C (41°F) at night. It is the wettest month of the year, with 109 mm (4.3 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Hayward in December

It's the month with the heaviest rainfall, so an umbrella is a must to navigate the wet weather. You can expect rain on roughly 14 days based on historical data, averaging 109 mm (4.3 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Hayward in December

Daytime highs in Hayward in December reach 14°C (57°F), with nights around 5°C (41°F). Winter occurs in December. Conditions are often most pleasant around the middle of the day. Nights drop to 5°C (41°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. This month often claims the chilliest averages of the year.

Sunshine in Hayward in December

The area enjoys a balanced 160 hours of sunlight, ensuring it's neither too overcast nor too sunny.

December in Hayward can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Hayward's climate page.

Hayward Temperature in December

Min Temperature 5°C (41°F)  

Max Temperature 14°C (57°F)  

Chance of Rain 45%  

Precipitation 109 mm (4.3 in)  

Rainy days 14 days  

Humidity 78% *  

Sunshine 160 hours *  

Percentage Sunshine 54% *  

* Data from: San Francisco, the United States of America (27 KM, 16 Miles).

What to Wear in Hayward in December

The weather can swing between comfortable and chilly in December, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Hayward in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Hayward's climate page.

More climate data for Hayward

Temperature Rainfall Sunshine Humidity

See the full Hayward climate overview or explore weather in the United States of America.