Monthly Weather Data Derbyshire Lane Sheffield South Yorkshire Dec 2009
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  Max Temp Min Temp Dry Bulb Wet Bulb Grass Min Soil Temp Barometer  Rain Humidity Max Gust Average Force Win Dir Comments
Day Deg F Deg F Deg F Deg F Deg F Deg F Inches MM Percent MPH MPH Beaufort  
1 41.7 29.5 31.1 31.1 20.3 43.9 29.84 4.4 100 31 2 1 S Sunny Spells Cloudy later Cold
2 44.6 30.0 42.1 41.9 21.4 42.8 29.51 1.1 98 19 9 3 SSW Milder Sunny Spells late light Showers
3 43.5 39.9 43.7 43.0 30.4 43.2 29.32 0.0 94 39 5 2 SW Sunny Spells Light Showers Breezy at times
4 44.0 37.9 39.2 37.4 30.4 43.2 29.65 5.7 83 26 10 3 WNW Sunny Spells 
5 52.0 38.0 43.9 43.5 30.9 43.0 29.41 15.3 97 39 8 3 SSW Sunny Spells
6 48.2 42.1 47.3 46.2 38.5 43.3 29.19 0.2 92 42 12 3 SSW Rain early Sunny spells later
7 48.4 41.1 44.6 42.6 36.5 44.2 29.45 1.7 84 34 12 3 SSW Sunny Spells then light rain later
8 49.1 38.0 45.1 43.9 30.9 44.2 29.50 0.5 90 25 6 2 SW Sunny Spells Odd spot of rain
9 49.1 43.3 46.6 44.8 36.5 44.2 29.94 4.8 86 28 12 3 SSW Sunny Spells Mild
10 48.0 43.1 46.0 44.4 36.5 44.2 30.15 0.0 87 26 5 2 WNW Sunny Spells Mild
11 41.0 31.0 32.2 32.0 22.8 43.7 30.49 0.0 98 13 5 2 SW Misty Cold
12 43.2 31.1 40.1 39.7 22.8 42.8 30.49 0.0 97 14 5 2 NNE Dull Misty cool by day Sunny Afternoon
13 42.8 36.0 38.5 37.6 30.7 42.4 30.39 1.1 88 21 5 2 NNE Sunny Spells Cool
14 41.0 36.1 40.1 39.2 31.1 42.4 30.19 7.5 92 15 1 1 NNW Light rain at Times
15 40.1 37.8 39.0 38.3 38.5 42.4 30.04 0.7 93 13 3 1 ESE Dull drizzle at times cold
16 40.8 35.0 40.5 39.9 31.8 42.8 29.90 3.0 95 21 8 3 NNW Light Rain at Times
17 35.8 33.8 34.9 34.5 30.4 42.8 29.89 0.3 96 38 8 3 NNE Overnight Rain then Sharp Snow Showers Afternoon
18 31.1 25.9 28.4 28.2 23.2 42.3 30.01 0.0 99 26 13 4 NNE Dry Sunny Spells Very Cold
19 34.9 24.9 28.4 28.2 16.3 40.6 29.89 0.2 99 25 5 2 SSE Very cold Sunny Spells Light Snow Showers Late afternoon
20 33.3 25.0 28.9 28.9 17.8 39.6 29.95 3.8 100 33 7 2 WNW Overnight Rain Sleet and Snow Showers very cold
21 34.3 26.9 31.8 31.1 21.2 39.2 29.93 0.0 100 23 7 2 SSW Sunny Spells very cold
22 34.3 21.2 26.6 26.4 23.7 38.8 29.01 2.8 100 32 9 3 SSW Sunny spells snow showers during afternoon
23 34.9 24.0 33.8 32.4 24.1 38.7 29.14 4.2 85 32 18 4 SW Less cold overnight due to strong winds. Sunny spells very cold
24 34.7 27.2 32.7 32.4 23.2 38.5 29.98 0.9 96 19 0 0 CALM Overnight Snow Very cold slow Thaw
25 38.8 30.9 33.8 32.9 29.1 38.1 29.35 0.7 90 29 8 3 W Sunny Spells Very Cold
26 42.1 32.3 39.2 38.7 28.4 38.1 29.47 0.4 95 36 9 3 SSW Sunny Spells Cool Overnight Rain
27 39.2 36.0 38.3 37.4 31.1 38.1 29.34 0.2 91 41 8 3 SSW Sunny Spells Cool Light Showers
28 35.6 29.0 30.2 30.0 20.3 38.1 29.69 0.0 97 11 0 0 CALM Sunny Spells Very Cold
29 36.7 28.9 33.8 33.6 21.9 37.8 29.54 9.8 98 24 3 1 NNE Misty Very Cold
30 36.5 33.1 36.3 35.6 32.4 37.8 29.40 3.0 96 35 11 3 ENE Light Rain ,Sleet and Snow
31 37.6 31.8 33.8 31.8 29.1 37.8 29.60 0.0 80 30 9 3 NNE Dry Cold Sunny Spells
   
Total 1257.3 1020.8     862.2 1279.0   72.3 2896.0 840.0 223.0 72.0  
Ave 40.6 32.9     27.8 41.3   2.3 93.4 27.1 7.2 2.3
79.0%
N 0.0 Number of Air Frosts 15.0 Red indicates as Snow
NNE 6.0 Number of Ground Frosts 25.0 Light green Sleet
NE 0.0 Days of measurable Rain 23.0 Blue Trace Conditions
ENE 1.0 Days of rain greater than 10 mm 1.0 Purple Indicates Freezing Rain
E 0.0 Days when gusts exceeded 50 mph 0.0
ESE 1.0 Days when average Max exceeded 6.0
SE 0.0 Days below average Max 24.0
SSE 1.0 Days above average Min 12.0
S 1.0 Days below average Min 19.0
SSW 9.0
SW 4.0 1st seven day average 41.5 5.3
WSW 0.0 2nd Seven day average 40.9 5.0
W 1.0 3rd seven day average 32.8 0.5
WNW 3.0 4th seven day avaerage 32.9 0.5
NW 0.0 Final few days average 34.1 1.2
NNW 2.0 Overall Average 36.4 2.5