When is the best time to go to Helena
The chart above shows the best time of year to visit Helena, 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 Helena
Helena weather by month
Please note our recommendations for when to visit Helena 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 |
|---|---|---|---|
| 8°C | 107mm | 5.9hrs | 11.1hrs |
January is a damp month in Helena and the temperature is generally cool.
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often not a good and not conducive to spending time outdoors.
January is in the winter in Helena and is typically the coldest month of the year. Daytime maximum temperatures average around a cold 9°C (48°F), whilst at night -2°C (29°F) is normal.
On average January is the driest month of the year in Helena 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 5.9 hours of sunshine per day.
February
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 11°C | 120mm | 6.7hrs | 11.8hrs |
February in Helena is generally wet with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often not a good and not conducive to spending time outdoors.
February is in the winter in Helena and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 12°C (53°F), whilst at night 1°C (33°F) is normal.
On average February is the 2nd driest month of the year in Helena with around 120mm 4.7 inches of rain making it a wet 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.
March
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 131mm | 7.7hrs | 12.8hrs |
The weather in March in Helena is characteristically mild and wet.
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
March is in the spring in Helena and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 5°C (42°F) is normal.
On average March is the 3rd driest month of the year in Helena with around 131mm 5.2 inches of rain making it a wet 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 7.7 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 134mm | 9.2hrs | 13.9hrs |
Helena's weather in April is typically mild and wet in nature.
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 Helena.
April is in the spring in Helena and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a comfortable 23°C (73°F), whilst at night 11°C (51°F) is normal.
On average April is the 4th driest month of the year in Helena with around 134mm 5.3 inches of rain making it a wet 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 9.2 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 25°C | 136mm | 10.4hrs | 14.8hrs |
May is a wet month in Helena and the temperature is generally warm.
It is perhaps a good month to visit Helena, with some extremely good weather at this time of year.
May is in the spring in Helena and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 16°C (60°F) is normal.
On average May is the 5th driest month of the year in Helena with around 136mm 5.3 inches of rain making it a wet 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 10.4 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 29°C | 101mm | 11.5hrs | 11.1hrs |
Hot and damp weather often prevails in Helena during the month of June
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
June is in the summer in Helena and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a warm 32°C (89°F), whilst at night 20°C (68°F) is normal.
On average June is the 6th driest month of the year in Helena with around 101mm 4 inches of rain making it a damp 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 11.5 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 30°C | 96mm | 11.2hrs | 11.8hrs |
July in Helena is generally a little damp with the temperature being hot.
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 Helena.
July is in the summer in Helena and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (92°F), whilst at night 22°C (71°F) is normal.
On average July is the 6th wettest month of the year in Helena with around 96mm 3.8 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 11.2 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 29°C | 75mm | 10.5hrs | 12.8hrs |
The weather in August in Helena is characteristically hot, humid and reasonably dry.
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 Helena.
August is in the summer in Helena and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 21°C (69°F) is normal.
On average August is the 5th wettest month of the year in Helena with around 75mm 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 10.5 hours of sunshine per day.
September
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 26°C | 85mm | 9hrs | 13.9hrs |
Helena's weather in September is typically hot, humid and a little damp in nature.
It is perhaps the perfect month to visit Helena, with some inordinately good weather at this time of year.
September is in the fall / autumn in Helena and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (85°F), whilst at night 17°C (63°F) is normal.
On average September is the 4th wettest month of the year in Helena with around 85mm 3.4 inches of rain making it a a little damp 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 9 hours of sunshine per day.
October
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 21°C | 76mm | 8.6hrs | 14.8hrs |
October is a reasonably dry month in Helena and the temperature is generally mild.
It is perhaps the perfect month to visit Helena, with some extremely good weather at this time of year.
October is in the fall / autumn in Helena and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 10°C (50°F) is normal.
On average October is the 3rd wettest month of the year in Helena with around 76mm 3 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 8.6 hours of sunshine per day.
November
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 15°C | 125mm | 6.3hrs | 11.1hrs |
The weather in November in Helena is characteristically mild and wet.
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
November is in the fall / autumn in Helena and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 5°C (42°F) is normal.
On average November is the 2nd wettest month of the year in Helena with around 125mm 4.9 inches of rain making it a wet 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 6.3 hours of sunshine per day.
December
| Temp | Rain | Sunshine | Day length |
|---|---|---|---|
| 10°C | 135mm | 5.5hrs | 11.8hrs |
December in Helena is generally wet with the temperature being cool.
Based on weather alone, this is probably a time of year to avoid going to Helena for your holidays. The weather is often not a good and not conducive to spending time outdoors.
December is in the winter in Helena and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 11°C (52°F), whilst at night 1°C (33°F) is normal.
On average December is the wettest month of the year in Helena with around 135mm 5.3 inches of rain making it a wet 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 5.5 hours of sunshine per day.
Other monthly averages
Helena weather stats
| Hottest month: | July | 33.1°C 91.6°F |
|---|---|---|
| Driest month: | August | 75mm 3ins |
| Sunniest month: | June | 11.5hrs |
| Coldest month: | January | 8.6°C 47.5°F |
| Wettest month: | May | 136mm 5.4ins |
| Warmest sea: | August | 25.9°C 78.6°F |
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