January 2025

Wistman's Wood, Dartmoor on a sunny and cold afternoon

Colder, duller and much wetter than the long term average.

Summary for January 2025
Mean Max: 8.6ºC (-0.3ºC)
Mean Min: 1.7ºC (-1.5ºC)
Mean: 5.1ºC (-0.9ºC)
High Max: 13.2ºC 5th
Low Max: 4.2ºC 3rd 
High Min: 7.3ºC 28th
Low Min: -2.8ºC 4th
Mean Grass Min: 0.0ºC  
Grass Min: 0.0ºC 1st
Days  >10°C 10 Days  
Days >5°C 28 Days  
Nights  >10°C 0 Days  
Nights  >5°C 8 Days  
Rain Total (gauge): 152.4 mm (186%)
Rain Total (tipping bucket): 138.8 mm (169%)
Rain Days >0.2 mm: 16 Days  
Rain Days >1.0 mm: 15 Days  
Max 24 hrs: 19.8 mm 26th
Days without any rain: 15  
Air Frost: 12 Days  
Grass Frost: 0 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Ice Days: 0 Days  
Thunder Heard: 3 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 0 Days  
Maximum UV Index: 1.4 31st
Ave 10 Min Wind >39 mph: 0.00 Days  
N: 4.28 Days 14%
NE: 1.19 Days 4%
E: 1.78 Days 6%
SE: 1.33 Days 4%
S: 5.34 Days 17%
SW: 4.28 Days 14%
W: 1.54 Days 5%
NW: 3.33 Days 11%
Calm: 7.93 Days 26%
Wind Chill Low: -6.7ºC 3rd 
Mean Wind: 3.8 mph  
Max Gust: 48 mph 24th
Mean Cloud Cover: 75%  
Mean RH @ 9am: 89%  
Rain >0.1mm/hour: 44.8 Hours  
Frost Duration: 55.1 Hours  
Air Frost in a Day: 11.4 Hours 8th
Mean Pressure @ 9am: 1012.5 hPa  
Mean Pressure: 1012.6 hPa  
Max Pressure: 1040.3 hPa 12th
Min Pressure: 972.0 hPa 6th
Max Change in 24 hours: 27.3 hPa 26th
Radiation Daily Mean: 2.91 MJ/m²  
Max Daily Value: 6.88 MJ/m² 31st
Min Daily Value: 0.04 MJ/m² 10th
Number of Days with Data: 31 Days  
1-Hour Maximum: 361 W/m² 31st
Starting Time of the Hour:   13:00
Max Dewpoint: 12.1ºC 5th
Min Dewpoint: -6.2ºC 3rd 
Mean Dewpoint: 3.1ºC  
Max Humidity: 94% 16th
Min Humidity: 66% 30th
Mean Humidity: 86%  
Total Monthly Sunshine: 79.9 Hours  
Most Sunshine in a Day: 8.8 Hours 31st
Average Daily Sunshine: 2.6 Hours  
Sunless Days: 12 Days  
Cloudless Days: 4 Days  
Total Possible Sunshine: 265.6 Hours  
Percentage of Total Sun: 30.1%  

 
 

 

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