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Contents
- The climate of Hayward
- The best time to visit Hayward
- The worst time to visit Hayward
- Spring weather in Hayward
- Summer weather in Hayward
- Autumn weather in Hayward
- Winter weather in Hayward
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The landscape of the famed Verdant Hills in Hayward, California
The climate of Hayward
Hayward, California, is categorized by the Köppen climate classification as having a Mediterranean warm summer, otherwise recognized as the 'Csb' predominate climate. This geographical position lends to its consistent and mild weather patterns, with temperatures ranging from 43.7°F (6.5°C) to 80.2°F (26.8°C) throughout the year.
The city's climate is marked by a modest variation in temperature, humidity, and rainfall. On the higher end of the scale, Hayward can reach 80.2°F (26.8°C) in July, dipping to a cooler 43.7°F (6.5°C) in January. Humidity ranges between 61% to 74% with the highest in March and lowest in September. The city's rainfall varies significantly, from a low of 0.04" (1mm) in July and August to a peak of 2.28" (58mm) in February.
The daylight hours have a high of 14.7 hours in June and decrease to 9.6 hours in December. Hayward enjoys sunshine for an average of over 6 hours per day, peaking at 12.1 hours in July. The UV index can reach a maximum of 6 in June and dips to 3 in January, February, November, and December.
Hayward sees a changing pattern in wind speed, reaching 6.6mph (10.6km/h) in May, while the least gusty months are October and November with a wind speed of 4.6mph (7.4km/h).
The city's climate is marked by a modest variation in temperature, humidity, and rainfall. On the higher end of the scale, Hayward can reach 80.2°F (26.8°C) in July, dipping to a cooler 43.7°F (6.5°C) in January. Humidity ranges between 61% to 74% with the highest in March and lowest in September. The city's rainfall varies significantly, from a low of 0.04" (1mm) in July and August to a peak of 2.28" (58mm) in February.
The daylight hours have a high of 14.7 hours in June and decrease to 9.6 hours in December. Hayward enjoys sunshine for an average of over 6 hours per day, peaking at 12.1 hours in July. The UV index can reach a maximum of 6 in June and dips to 3 in January, February, November, and December.
Hayward sees a changing pattern in wind speed, reaching 6.6mph (10.6km/h) in May, while the least gusty months are October and November with a wind speed of 4.6mph (7.4km/h).
The best time to visit Hayward
With Hayward's weather conditions, the best time to enjoy this location would be between late April to mid-October. During this time, visitors can expect warm and dry weather with peak temperatures in the mid-70s and 80s°F, which coincides with the lowest rainfall levels of the year. The daylight lasts for over 13 hours in the height of summer, offering ample time to enjoy outdoor activities. The UV index is above average, so sun protection measures should be taken.
The worst time to visit Hayward
The less favorable time to visit Hayward is during the winter months, precisely from December to early March. During this period, daytime temperatures can fall to the low 50s°F, and evening temperatures drop even lower. Rainfall during these months is comparatively higher, peaking in February at 2.28" (58mm). Daylight hours are shorter, decreasing to fewer than 10 hours.
Spring weather in Hayward
The spring season in Hayward, from March to May, showcases a steady rise in temperatures from 59.5°F (15.3°C) to 70.3°F (21.3°C). Rainfall starts to decline, signaling the transition from the wet season to the dry summer season. The UV index starts to increase from 4 in March to 5 in April and May. The average humidity remains relatively consistent from 72% in March to 67% in May. Daylight lasts for about 12 to 14 hours daily.
Summer weather in Hayward
The summer months of June to August in Hayward typically record the warmest temperatures of the year, with the maximum average reaching a warm 80.2°F (26.8°C) in July. Humidity decreases to its lowest point of around 63%, indicative of the dry, Mediterranean summer. The days are longest in this period, with the sunlight lasting up to 14.7 hours in June. The UV index remains consistently high, reaching an average of 6 in June.
Autumn weather in Hayward
September to November is the period of fall in Hayward, with temperatures gradually decreasing from 79°F (26.1°C) to 63.5°F (17.5°C). The rainfall starts increasing from 0.12" (3mm) in September to 1.34" (34mm) in November. Daylight starts to reduce during these months, shrinking from about 12 hours in September to approximately 10 hours in November.
Winter weather in Hayward
From December to February, Hayward experiences winter with cooler temperatures, ranging from 57°F (13.9°C) in December to 61.9°F (16.6°C) in February. The humidity and rainfall are at their highest during these winter months. The length of daylight decreases further, with the shortest days occurring in December, lasting around 9.6 hours. Despite these conditions, the winter temperatures in Hayward remain relatively mild compared to other regions.
Weather in January
In the first month of the year, Hayward, California, witnesses a gradual change from winter to the early inklings of spring. Characterized by warmer high temperatures and marginally cooler lows, this month shows a slight deviation from the cooler temperatures of December. Weather in January »
Weather in February
With the season of spring imminent, February in Hayward shows progressive warm-up in temperatures, although the cool nights remain a reminder of winter. The rainfall witnesses a brief spike before heading into a months-long decline. Weather in February »
Weather in March
March signifies the official arrival of spring in Hayward, bringing with it an uptick in temperatures. The rainfall heads into a sustained decrease which lasts till summer while relative humidity increases slightly. The lengthening days open windows for more sunshine hours while wind speeds reach annual highs. Weather in March »
Weather in April
April sees drastic changes in weather conditions in Hayward. Temperatures continue their upward trend, while rainfall takes a nosedive, and the number of rainy days reduces by half. The humidity sees a reduction and the city gets more daylight, indicating that summer is on the horizon. Weather in April »
Weather in May
May encourages pleasant weather conditions in Hayward. The city experiences consistent climatic conditions with increased high temperatures, decreased humidity, and low rainfall. The extended daylight hours invite more sunshine, and wind speeds gradually decrease. Weather in May »
Weather in June
June marks the onset of summers in Hayward with warm temperatures and noticeably dry conditions. With an insignificant amount of rainfall, the place visibly transitions into sunny Californian conditions. The prevailing high pressure considerably lowers the relative humidity, and the persistent sunshine further elevates temperatures. Weather in June »
Weather in July
July is the hottest month in Hayward, characterized by high temperatures and the fewest cloudy days. With minimum rainfall, maximum daylight, and long sunshine hours, July epitomizes the prime of summer. Relative humidity remains constant, but the month carries superb visibility, indicative of minimal cloudy coverage. Weather in July »
Weather in August
August continues the hot weather pattern in Hayward, although temperatures witness a slight dip from July highs. The city experiences minimal rain, essentially continuing the dry spell, while relative humidity increases marginally. Weather in August »
Weather in September
September transitions Hayward from the hot summers to the cooler fall season. Although the rain does not show a significant increase, the temperatures start their descent into cooler hues, and the humidity decreases slightly. Weather in September »
Weather in October
October brings significant changes in weather conditions in Hayward. Temperatures further decrease, but the city continues to experience minimal rain. The relative humidity remains constant while the length of days continues to shorten. Weather in October »
Weather in November
November steers Hayward into winter with colder temperatures and an increase in rainfall. The humidity sees an upsurge and the city experiences more cloudy days, reducing both daylight and sunshine hours. The wind speeds remain relatively calmer, with a gradual dwindling pattern. Weather in November »
Weather in December
December in Hayward is synonymous with cool weather, increased rainfall, and heightened humidity. With the pressure peaking this month, temperatures hit their annual lowest, and daylight hours are at their scanty best. The increased rainfall furthers the cloudy conditions, reducing visibility. Weather in December »
Updated: Jun 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How many days does it rain?
In Hayward, California, during the entire year, the rain falls for 69.2 days and collects up to 11.1" (282mm) of precipitation.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
What is the rainiest month?
The month with the most rainfall is February, when the rain falls for 8.3 days and typically aggregates up to 2.28" (58mm) of precipitation.
What is the most humid month?
The most humid month is March, with an average relative humidity of 74%.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
When are the longest days in Hayward?
With an average of 14h and 42min of daylight, June has the longest days of the year.
When is the highest UV index?
With an average maximum UV index of 6, June is the month with the highest UV index.
What month is the hottest?
The highest temperatures are recorded in July, with averages reaching a high of 80.2°F (26.8°C) and a low of 55.2°F (12.9°C).
What is the driest month?
The months with the least rainfall in Hayward are July and August Rain falls for 1.5 days and accumulates 0.04" (1mm) of rain.
What month has the most sunshine in Hayward?
July has the most sunshine of the year in Hayward, with an average of 12.1h of sunshine.
What is the least humid month?
With an average relative humidity of 61%, September is the least humid month in Hayward.
What part of the year is the coldest?
December stands out as Hayward's coldest month, with temperatures ranging between an average high of 55.9°F (13.3°C) and a low of 43.7°F (6.5°C).
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 36min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5.9h of sunshine.
Average temperature
Hayward, CA
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (55.9°F).
The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (43.7°F).
Average pressure
Hayward, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed
Hayward, CA
- Average wind speed in January:
4.8mph - Average wind speed in February:
5.8mph - Average wind speed in March:
6mph - Average wind speed in April:
6.3mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.4mph - Average wind speed in September:
5mph - Average wind speed in October:
4.7mph - Average wind speed in November:
4.6mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity
Hayward, CA
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (61%).
Average rainfall
Hayward, CA
- Average rainfall in January:
1.89" - Average rainfall in February:
2.28" - Average rainfall in March:
1.81" - Average rainfall in April:
0.63" - Average rainfall in May:
0.51" - Average rainfall in June:
0.12"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.12" - Average rainfall in October:
0.51" - Average rainfall in November:
1.34" - Average rainfall in December:
1.81"
The wettest month (with the highest rainfall) is February (2.28").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Hayward, CA
- Average rainfall days in January:
9.3 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
7 days - Average rainfall days in May:
4.3 days - Average rainfall days in June:
1.6 days
- Average rainfall days in July:
1.5 days - Average rainfall days in August:
0.9 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
4.6 days - Average rainfall days in November:
7 days - Average rainfall days in December:
10.2 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.9 days).
Average daylight / Average sunshine
Hayward, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
6h and 2min - Average sunshine in February:
6h and 2min - Average sunshine in March:
8h and 0min - Average sunshine in April:
10h and 3min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days
Hayward, CA
- Average sunshine days in January:
20.5 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
22.1 days - Average sunshine days in May:
26 days - Average sunshine days in June:
27.3 days
- Average sunshine days in July:
28.8 days - Average sunshine days in August:
28.9 days - Average sunshine days in September:
27.1 days - Average sunshine days in October:
25.5 days - Average sunshine days in November:
22.4 days - Average sunshine days in December:
19.4 days
The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (17.3 days).
Average UV index
Hayward, CA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Hayward, CA
The months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility
Hayward, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Hayward, California, USA
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