When is the best time to go to Castro Valley
The chart above shows the best time of year to visit Castro Valley, 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 Castro Valley
Castro Valley weather by month
Please note our recommendations for when to visit Castro Valley 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 |
|---|---|---|---|
| 12°C | 107mm | 6.2hrs | 10.9hrs |
Cool and damp weather often prevails in Castro Valley during the month of January
Based on weather alone, this is probably a time of year to avoid going to Castro Valley for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
January is in the winter in Castro Valley and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 4°C (40°F) is normal.
On average January is the driest month of the year in Castro Valley with around 107mm 4.2 inches of rain making it a damp 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 6.2 hours of sunshine per day.
Castro Valley weather in January »
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 14°C | 82mm | 8hrs | 11.7hrs |
February in Castro Valley is generally a little damp with the temperature being mild.
Although outside the main holiday season, there is still plenty of relatively acceptable weather around this time of year. This makes it an okay time to visit Castro Valley.
February is in the winter in Castro Valley and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night 6°C (43°F) is normal.
On average February is the 2nd driest month of the year in Castro Valley with around 82mm 3.2 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 8 hours of sunshine per day.
Castro Valley weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 77mm | 9.4hrs | 12.8hrs |
The weather in March in Castro Valley 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 Castro Valley.
March is in the spring in Castro Valley and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 7°C (44°F) is normal.
On average March is the 3rd driest month of the year in Castro Valley with around 77mm 3 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.
Castro Valley weather in March »
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 17°C | 39mm | 11.2hrs | 14hrs |
Castro Valley's weather in April is typically mild and reasonably dry in nature.
Although outside the main holiday season, there is still plenty of pretty acceptable weather around this time of year. This makes it an okay time to visit Castro Valley.
April is in the spring in Castro Valley and is typically the 4th coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 8°C (46°F) is normal.
On average April is the 4th driest month of the year in Castro Valley with around 39mm 1.5 inches of rain making it a reasonably 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.
Castro Valley weather in April »
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 19°C | 9mm | 11.9hrs | 15.1hrs |
May is a very dry month in Castro Valley and the temperature is generally mild.
It is perhaps the perfect month to visit Castro Valley, with some surprisingly good weather at this time of year.
May is in the spring in Castro Valley and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 10°C (49°F) is normal.
On average May is the 5th driest month of the year in Castro Valley with around 9mm 0.4 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.9 hours of sunshine per day.
Castro Valley weather in May »
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 4mm | 12.1hrs | 10.9hrs |
The climate in Castro Valley during June can be summarized as mild and very dry.
It is perhaps the perfect month to visit Castro Valley, with some extremely good weather at this time of year.
June is in the summer in Castro Valley and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 11°C (53°F) is normal.
On average June is the 6th driest month of the year in Castro Valley with around 4mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 12.1 hours of sunshine per day.
Castro Valley weather in June »
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 2mm | 12hrs | 11.7hrs |
July in Castro Valley is generally very dry with the temperature being warm.
It is perhaps the perfect month to visit Castro Valley, with some very good weather at this time of year.
July is in the summer in Castro Valley and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 12°C (54°F) is normal.
On average July is the 6th wettest month of the year in Castro Valley 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 12 hours of sunshine per day.
Castro Valley weather in July »
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 3mm | 11hrs | 12.8hrs |
The weather in August in Castro Valley is characteristically warm and very dry.
It is perhaps the perfect month to visit Castro Valley, with some extremely good weather at this time of year.
August is in the summer in Castro Valley and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 25°C (78°F), whilst at night 13°C (55°F) is normal.
On average August is the 5th wettest month of the year in Castro Valley with around 3mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11 hours of sunshine per day.
Castro Valley weather in August »
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 7mm | 10.4hrs | 14hrs |
Castro Valley's weather in September is typically warm and very dry in nature.
It is perhaps the perfect month to visit Castro Valley, with some extremely good weather at this time of year.
September is in the fall / autumn in Castro Valley and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 25°C (77°F), whilst at night 12°C (54°F) is normal.
On average September is the 4th wettest month of the year in Castro Valley 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 10.4 hours of sunshine per day.
Castro Valley weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 20°C | 30mm | 9.1hrs | 15.1hrs |
October is a reasonably dry month in Castro Valley and the temperature is generally mild.
It is perhaps a good month to visit Castro Valley, with some very good weather at this time of year.
October is in the fall / autumn in Castro Valley and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (73°F), whilst at night 10°C (51°F) is normal.
On average October is the 3rd wettest month of the year in Castro Valley with around 30mm 1.2 inches of rain making it a reasonably 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 9.1 hours of sunshine per day.
Castro Valley weather in October »
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 76mm | 6.6hrs | 10.9hrs |
The climate in Castro Valley during November can be summarized as mild and reasonably dry.
Although outside the main holiday season, there is still plenty of pretty acceptable weather around this time of year. This makes it an okay time to visit Castro Valley.
November is in the fall / autumn in Castro Valley and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 7°C (45°F) is normal.
On average November is the 2nd wettest month of the year in Castro Valley with around 76mm 3 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 6.6 hours of sunshine per day.
Castro Valley weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 12°C | 82mm | 5.6hrs | 11.7hrs |
December in Castro Valley is generally a little damp with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Castro Valley for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
December is in the winter in Castro Valley and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 5°C (41°F) is normal.
On average December is the wettest month of the year in Castro Valley with around 82mm 3.2 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 5.6 hours of sunshine per day.
Other monthly averages
Castro Valley weather stats
| Hottest month: | August | 25°C 77°F |
|---|---|---|
| Driest month: | July | 2mm 0.1ins |
| Sunniest month: | April | 11.2hrs |
| Coldest month: | January | 13°C 55.4°F |
| Wettest month: | January | 107mm 4.2ins |
| Warmest sea: | September | 14.4°C 57.9°F |
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