When is the best time to go to Sunnyvale
The chart above shows the best time of year to visit Sunnyvale, United States. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in Sunnyvale
Sunnyvale weather by month
Please note our recommendations for when to visit Sunnyvale are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 13°C | 87mm | 6.2hrs | 10.9hrs |
Cool and a little damp weather often prevails in Sunnyvale during the month of January
Based on weather alone, this is probably a time of year to avoid going to Sunnyvale for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
January is in the winter in Sunnyvale and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 5°C (40°F) is normal.
On average January is the driest month of the year in Sunnyvale with around 87mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.2 hours of sunshine per day.
Sunnyvale weather in January »
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 66mm | 7.9hrs | 11.7hrs |
February in Sunnyvale is generally reasonably dry with the temperature being mild.
Based on weather alone, this is probably a time of year to avoid going to Sunnyvale for your holidays. The weather is often not a good and not conducive to spending time outdoors.
February is in the winter in Sunnyvale and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 16°C (61°F), whilst at night 6°C (43°F) is normal.
On average February is the 2nd driest month of the year in Sunnyvale with around 66mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.9 hours of sunshine per day.
Sunnyvale weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 16°C | 65mm | 9.4hrs | 12.8hrs |
The weather in March in Sunnyvale is characteristically mild and reasonably dry.
Based on weather alone, this is probably a time of year to avoid going to Sunnyvale for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
March is in the spring in Sunnyvale and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 7°C (45°F) is normal.
On average March is the 3rd driest month of the year in Sunnyvale with around 65mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.4 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 18°C | 30mm | 11.2hrs | 14hrs |
Sunnyvale's weather in April is typically mild and dry in nature.
It is perhaps a good month to visit Sunnyvale, with some very good weather at this time of year.
April is in the spring in Sunnyvale and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 8°C (46°F) is normal.
On average April is the 4th driest month of the year in Sunnyvale with around 30mm 1.2 inches of rain making it a dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 11.2 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 20°C | 7mm | 11.7hrs | 15.1hrs |
May is a very dry month in Sunnyvale and the temperature is generally mild.
It is perhaps the perfect month to visit Sunnyvale, with some inordinately good weather at this time of year.
May is in the spring in Sunnyvale and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 10°C (50°F) is normal.
On average May is the 5th driest month of the year in Sunnyvale with around 7mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.7 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 22°C | 2mm | 11.8hrs | 10.9hrs |
The climate in Sunnyvale during June can be summarized as warm and very dry.
It is perhaps the perfect month to visit Sunnyvale, with some particularly good weather at this time of year.
June is in the summer in Sunnyvale and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a comfortable 25°C (76°F), whilst at night 12°C (53°F) is normal.
On average June is the 6th driest month of the year in Sunnyvale with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.8 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 1mm | 11.7hrs | 11.7hrs |
July in Sunnyvale is generally very dry with the temperature being warm.
It is perhaps the perfect month to visit Sunnyvale, with some inordinately good weather at this time of year.
July is in the summer in Sunnyvale and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 13°C (55°F) is normal.
On average July is the 6th wettest month of the year in Sunnyvale with around 1mm 0 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.7 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 1mm | 10.8hrs | 12.8hrs |
The weather in August in Sunnyvale is characteristically warm and very dry.
It is perhaps the perfect month to visit Sunnyvale, with some surprisingly good weather at this time of year.
August is in the summer in Sunnyvale and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 13°C (56°F) is normal.
On average August is the 5th wettest month of the year in Sunnyvale with around 1mm 0 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.8 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 4mm | 10.3hrs | 14hrs |
Sunnyvale's weather in September is typically warm and very dry in nature.
It is perhaps the perfect month to visit Sunnyvale, with some particularly good weather at this time of year.
September is in the fall / autumn in Sunnyvale and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 13°C (55°F) is normal.
On average September is the 4th wettest month of the year in Sunnyvale with around 4mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.3 hours of sunshine per day.
Sunnyvale weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 22mm | 9hrs | 15.1hrs |
October is a dry month in Sunnyvale and the temperature is generally mild.
It is perhaps the perfect month to visit Sunnyvale, with some very good weather at this time of year.
October is in the fall / autumn in Sunnyvale and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (74°F), whilst at night 10°C (50°F) is normal.
On average October is the 3rd wettest month of the year in Sunnyvale with around 22mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
Sunnyvale weather in October »
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 16°C | 56mm | 6.5hrs | 10.9hrs |
The weather in November in Sunnyvale is characteristically mild and reasonably dry.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit Sunnyvale.
November is in the fall / autumn in Sunnyvale and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 7°C (45°F) is normal.
On average November is the 2nd wettest month of the year in Sunnyvale with around 56mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
Sunnyvale weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 13°C | 64mm | 5.6hrs | 11.7hrs |
December in Sunnyvale is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Sunnyvale for your holidays. The weather is often not a good and not conducive to spending time outdoors.
December is in the winter in Sunnyvale and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 5°C (41°F) is normal.
On average December is the wettest month of the year in Sunnyvale with around 64mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
Other monthly averages
Sunnyvale weather stats
| Hottest month: | August | 25.6°C 78.1°F |
|---|---|---|
| Driest month: | July | 1mm 0ins |
| Sunniest month: | April | 11.2hrs |
| Coldest month: | January | 13.9°C 57°F |
| Wettest month: | January | 87mm 3.4ins |
| Warmest sea: | September | 14.4°C 57.9°F |
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