Climate and monthly weather forecastHayward, CA

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 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 »