When is the best time to go to Portsmouth
The chart above shows the best time of year to visit Portsmouth, 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 Portsmouth
Portsmouth weather by month
Please note our recommendations for when to visit Portsmouth 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 |
|---|---|---|---|
| 4°C | 77mm | 4.3hrs | 10.8hrs |
January in Portsmouth is generally reasonably dry with the temperature being cold.
Based on weather alone, this is probably a time of year to avoid going to Portsmouth for your holidays. The weather is often not a good and not conducive to spending time outdoors.
January is in the winter in Portsmouth and is typically the coldest month of the year. Daytime maximum temperatures average around a freezing 4°C (39°F), whilst at night -7°C (20°F) is normal.
On average January is the driest month of the year in Portsmouth with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.3 hours of sunshine per day.
Portsmouth weather in January »
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 6°C | 73mm | 5.1hrs | 11.7hrs |
February in Portsmouth is generally reasonably dry with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Portsmouth for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
February is in the winter in Portsmouth and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cold 6°C (43°F), whilst at night -5°C (23°F) is normal.
On average February is the 2nd driest month of the year in Portsmouth with around 73mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.1 hours of sunshine per day.
Portsmouth weather in February »
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 11°C | 99mm | 6.1hrs | 12.8hrs |
The weather in March in Portsmouth is characteristically cool and a little damp.
Based on weather alone, this is probably a time of year to avoid going to Portsmouth for your holidays. The weather is often not a good and not conducive to spending time outdoors.
March is in the spring in Portsmouth and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 13°C (55°F), whilst at night 0°C (33°F) is normal.
On average March is the 3rd driest month of the year in Portsmouth with around 99mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.1 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 17°C | 92mm | 7.5hrs | 14.1hrs |
Portsmouth's weather in April is typically mild and a little damp in nature.
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 Portsmouth.
April is in the spring in Portsmouth and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 19°C (65°F), whilst at night 5°C (41°F) is normal.
On average April is the 4th driest month of the year in Portsmouth with around 92mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.5 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 111mm | 8.5hrs | 15.2hrs |
May is a damp month in Portsmouth and the temperature is generally mild.
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 Portsmouth.
May is in the spring in Portsmouth and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 10°C (51°F) is normal.
On average May is the 5th driest month of the year in Portsmouth with around 111mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.5 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 25°C | 91mm | 9.2hrs | 10.8hrs |
Warm, humid and a little damp weather often prevails in Portsmouth during the month of June
It is perhaps the perfect month to visit Portsmouth, with some particularly good weather at this time of year.
June is in the summer in Portsmouth and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a muggy 28°C (83°F), whilst at night 15°C (58°F) is normal.
On average June is the 6th driest month of the year in Portsmouth with around 91mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.2 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 27°C | 108mm | 8.9hrs | 11.7hrs |
July in Portsmouth is generally damp with the temperature being hot.
It is perhaps a good month to visit Portsmouth, with some particularly good weather at this time of year.
July is in the summer in Portsmouth and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (86°F), whilst at night 17°C (63°F) is normal.
On average July is the 6th wettest month of the year in Portsmouth with around 108mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.9 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 26°C | 101mm | 8.5hrs | 12.8hrs |
The weather in August in Portsmouth is characteristically warm, humid and damp.
It is perhaps a good month to visit Portsmouth, with some particularly good weather at this time of year.
August is in the summer in Portsmouth and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (85°F), whilst at night 16°C (61°F) is normal.
On average August is the 5th wettest month of the year in Portsmouth with around 101mm 4 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 8.5 hours of sunshine per day.
Portsmouth weather in August »
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 23°C | 82mm | 7.7hrs | 14.1hrs |
Portsmouth's weather in September is typically warm and a little damp in nature.
It is perhaps the perfect month to visit Portsmouth, with some particularly good weather at this time of year.
September is in the fall / autumn in Portsmouth and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 26°C (78°F), whilst at night 12°C (54°F) is normal.
On average September is the 4th wettest month of the year in Portsmouth 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 7.7 hours of sunshine per day.
Portsmouth weather in September »
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 18°C | 63mm | 6.7hrs | 15.2hrs |
October is a reasonably dry month in Portsmouth and the temperature is generally mild.
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 Portsmouth.
October is in the fall / autumn in Portsmouth and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a cool 20°C (68°F), whilst at night 6°C (42°F) is normal.
On average October is the 3rd wettest month of the year in Portsmouth with around 63mm 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 6.7 hours of sunshine per day.
Portsmouth weather in October »
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 12°C | 77mm | 4.4hrs | 10.8hrs |
Portsmouth's weather in November is typically cool and reasonably dry in nature.
Based on weather alone, this is probably a time of year to avoid going to Portsmouth for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
November is in the fall / autumn in Portsmouth and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 1°C (34°F) is normal.
On average November is the 2nd wettest month of the year in Portsmouth with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 4.4 hours of sunshine per day.
Portsmouth weather in November »
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 6°C | 80mm | 3.6hrs | 11.7hrs |
December in Portsmouth 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 Portsmouth for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
December is in the winter in Portsmouth and is typically the warmest month of the year. Daytime maximum temperatures average around a cold 7°C (44°F), whilst at night -4°C (25°F) is normal.
On average December is the wettest month of the year in Portsmouth with around 80mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 3.6 hours of sunshine per day.
Other monthly averages
Portsmouth weather stats
| Hottest month: | July | 29.5°C 85.1°F |
|---|---|---|
| Driest month: | October | 63mm 2.5ins |
| Sunniest month: | June | 9.2hrs |
| Coldest month: | January | 3.8°C 38.8°F |
| Wettest month: | May | 111mm 4.4ins |
| Warmest sea: | August | 24.9°C 76.8°F |
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