When is the best time to go to Altadena
The chart above shows the best time of year to visit Altadena, 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 Altadena
Altadena weather by month
Please note our recommendations for when to visit Altadena 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 | 76mm | 7.3hrs | 11.1hrs |
January in Altadena is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Altadena for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
January is in the winter in Altadena and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 1°C (33°F) is normal.
On average January is the driest month of the year in Altadena with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.3 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 13°C | 63mm | 8.2hrs | 11.8hrs |
February in Altadena is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Altadena for your holidays. The weather is often not a good and not conducive to spending time outdoors.
February is in the winter in Altadena and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 15°C (58°F), whilst at night 2°C (35°F) is normal.
On average February is the 2nd driest month of the year in Altadena with around 63mm 2.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
Altadena weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 14°C | 55mm | 8.7hrs | 12.8hrs |
The weather in March in Altadena is characteristically cool and reasonably dry.
Based on weather alone, this is probably a time of year to avoid going to Altadena for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
March is in the spring in Altadena and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 2°C (36°F) is normal.
On average March is the 3rd driest month of the year in Altadena with around 55mm 2.2 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 8.7 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 16°C | 32mm | 10.3hrs | 13.9hrs |
Altadena's weather in April is typically mild and reasonably dry in nature.
Although outside the main holiday season, there is still plenty of fairly acceptable weather around this time of year. This makes it an okay time to visit Altadena.
April is in the spring in Altadena and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 4°C (39°F) is normal.
On average April is the 4th driest month of the year in Altadena with around 32mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.3 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 20°C | 10mm | 10.1hrs | 14.8hrs |
May is a very dry month in Altadena and the temperature is generally mild.
It is perhaps the perfect month to visit Altadena, with some particularly good weather at this time of year.
May is in the spring in Altadena and is typically the 5th coldest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 8°C (46°F) is normal.
On average May is the 5th driest month of the year in Altadena with around 10mm 0.4 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.1 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 24°C | 3mm | 11hrs | 11.1hrs |
June in Altadena is generally very dry with the temperature being warm.
It is perhaps the perfect month to visit Altadena, with some particularly good weather at this time of year.
June is in the summer in Altadena and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 12°C (53°F) is normal.
On average June is the 6th driest month of the year in Altadena 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.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 28°C | 5mm | 12.1hrs | 11.8hrs |
July in Altadena is generally very dry with the temperature being hot.
It is perhaps a good month to visit Altadena, with some particularly good weather at this time of year.
July is in the summer in Altadena and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (89°F), whilst at night 16°C (60°F) is normal.
On average July is the 6th wettest month of the year in Altadena with around 5mm 0.2 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.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 28°C | 7mm | 11.6hrs | 12.8hrs |
The weather in August in Altadena is characteristically hot and very dry.
It is perhaps a good month to visit Altadena, with some particularly good weather at this time of year.
August is in the summer in Altadena and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (88°F), whilst at night 15°C (60°F) is normal.
On average August is the 5th wettest month of the year in Altadena 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 11.6 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 25°C | 8mm | 10.2hrs | 13.9hrs |
Altadena's weather in September is typically warm and very dry in nature.
It is perhaps the perfect month to visit Altadena, with some extremely good weather at this time of year.
September is in the fall / autumn in Altadena and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 12°C (54°F) is normal.
On average September is the 4th wettest month of the year in Altadena with around 8mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 10.2 hours of sunshine per day.
Altadena weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 9mm | 9hrs | 14.8hrs |
October is a very dry month in Altadena and the temperature is generally mild.
It is perhaps the perfect month to visit Altadena, with some particularly good weather at this time of year.
October is in the fall / autumn in Altadena and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 8°C (46°F) is normal.
On average October is the 3rd wettest month of the year in Altadena with around 9mm 0.3 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 49mm | 7.6hrs | 11.1hrs |
Mild and reasonably dry weather often prevails in Altadena during the month of November
Although outside the main holiday season, there is still plenty of reasonably acceptable weather around this time of year. This makes it an okay time to visit Altadena.
November is in the fall / autumn in Altadena and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 4°C (39°F) is normal.
On average November is the 2nd wettest month of the year in Altadena with around 49mm 1.9 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 7.6 hours of sunshine per day.
Altadena weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 12°C | 55mm | 7.3hrs | 11.8hrs |
December in Altadena is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Altadena for your holidays. The weather is often not a good and not conducive to spending time outdoors.
December is in the winter in Altadena and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 0°C (33°F) is normal.
On average December is the wettest month of the year in Altadena with around 55mm 2.2 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 7.3 hours of sunshine per day.
Other monthly averages
Altadena weather stats
| Hottest month: | July | 31°C 87.8°F |
|---|---|---|
| Driest month: | June | 3mm 0.1ins |
| Sunniest month: | August | 11.6hrs |
| Coldest month: | December | 12.7°C 54.9°F |
| Wettest month: | January | 76mm 3ins |
| Warmest sea: | September | 18.6°C 65.5°F |
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