Currently: 53 °F. Clear. (Weather station: Isle Of Portland, United Kingdom). See more current weatherAnnual Weather Averages Near Dorchester
Averages are for Isle Of Portland, which is 14 miles from Dorchester.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Dorchester
High Temp: 67 °F
Low Temp: 41 °F
Mean Temp: 53 °F
Precipitation: 2.49"
Humidity: 83%
Dew Point: 48 °F
Wind: 30 mph
Pressure: 29.99 "Hg
Visibility: 12 mi
January Climate & Weather Averages in Dorchester
High Temp: 48 °F
Low Temp: 42 °F
Mean Temp: 45 °F
Precipitation: 3.39"
Humidity: 84%
Dew Point: 41 °F
Wind: 36 mph
Pressure: 29.97 "Hg
Visibility: 11 mi
February Climate & Weather Averages in Dorchester
High Temp: 47 °F
Low Temp: 41 °F
Mean Temp: 44 °F
Precipitation: 2.42"
Humidity: 83%
Dew Point: 39 °F
Wind: 36 mph
Pressure: 29.98 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Dorchester
High Temp: 50 °F
Low Temp: 42 °F
Mean Temp: 46 °F
Precipitation: 2.10"
Humidity: 84%
Dew Point: 41 °F
Wind: 31 mph
Pressure: 30.01 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Dorchester
High Temp: 53 °F
Low Temp: 44 °F
Mean Temp: 49 °F
Precipitation: 1.90"
Humidity: 82%
Dew Point: 43 °F
Wind: 27 mph
Pressure: 29.99 "Hg
Visibility: 12 mi
May Climate & Weather Averages in Dorchester
High Temp: 58 °F
Low Temp: 49 °F
Mean Temp: 53 °F
Precipitation: 1.98"
Humidity: 84%
Dew Point: 48 °F
Wind: 26 mph
Pressure: 30.00 "Hg
Visibility: 12 mi
June Climate & Weather Averages in Dorchester
High Temp: 62 °F
Low Temp: 54 °F
Mean Temp: 58 °F
Precipitation: 1.93"
Humidity: 86%
Dew Point: 54 °F
Wind: 25 mph
Pressure: 30.02 "Hg
Visibility: 12 mi
July Climate & Weather Averages in Dorchester
High Temp: 67 °F
Low Temp: 58 °F
Mean Temp: 62 °F
Precipitation: 1.98"
Humidity: 84%
Dew Point: 57 °F
Wind: 24 mph
Pressure: 30.02 "Hg
Visibility: 14 mi
August Climate & Weather Averages in Dorchester
High Temp: 67 °F
Low Temp: 59 °F
Mean Temp: 63 °F
Precipitation: 2.41"
Humidity: 84%
Dew Point: 57 °F
Wind: 26 mph
Pressure: 30.00 "Hg
Visibility: 14 mi
September Climate & Weather Averages in Dorchester
High Temp: 65 °F
Low Temp: 56 °F
Mean Temp: 61 °F
Precipitation: 1.74"
Humidity: 81%
Dew Point: 54 °F
Wind: 28 mph
Pressure: 30.05 "Hg
Visibility: 14 mi
October Climate & Weather Averages in Dorchester
High Temp: 59 °F
Low Temp: 53 °F
Mean Temp: 56 °F
Precipitation: 3.42"
Humidity: 83%
Dew Point: 51 °F
Wind: 33 mph
Pressure: 29.96 "Hg
Visibility: 13 mi
November Climate & Weather Averages in Dorchester
High Temp: 53 °F
Low Temp: 47 °F
Mean Temp: 50 °F
Precipitation: 3.14"
Humidity: 83%
Dew Point: 45 °F
Wind: 34 mph
Pressure: 29.92 "Hg
Visibility: 13 mi
December Climate & Weather Averages in Dorchester
High Temp: 51 °F
Low Temp: 45 °F
Mean Temp: 48 °F
Precipitation: 3.46"
Humidity: 85%
Dew Point: 44 °F
Wind: 37 mph
Pressure: 29.97 "Hg
Visibility: 11 mi