Annual mean 11°C · wettest around December · prevailing wind W
Warmest
20.7 °C
Coldest
4.8 °C
Wettest
22%
Windiest
7.6 m/s
Prevailing
W
6.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Sleaford over the whole year is 11°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about 3°C. Sleaford has no sharply defined rainy season: the chance of rain on a given day runs from 10% in April, the driest month, to 17% in December, the wettest. Winds in Sleaford are highest in February, averaging 6.2 m/s (22 km/h), and lightest in July, at 4.6 m/s (17 km/h). The prevailing wind is from the W. The clearest skies in Sleaford come in April, when the sky is typically 56% covered; December is the cloudiest month, at 70%.
Month by month Sleaford climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
6°C
3°C
-1°C
13%
66%
5.8 m/s
0
0
5
February
8°C
4°C
1°C
16%
65%
6.2 m/s
0
0
13
March
10°C
5°C
4°C
15%
65%
5.6 m/s
1
0
28
April
12°C
6°C
6°C
10%
56%
5.1 m/s
7
0
46
May
16°C
10°C
11°C
12%
57%
4.7 m/s
27
0
76
June
19°C
13°C
15°C
14%
60%
4.8 m/s
49
5
78
July
20°C
15°C
17°C
13%
62%
4.6 m/s
68
8
78
August
20°C
14°C
17°C
11%
61%
4.9 m/s
67
6
80
September
18°C
12°C
14°C
13%
63%
4.7 m/s
44
5
78
October
14°C
9°C
9°C
15%
66%
5.2 m/s
9
0
68
November
9°C
6°C
4°C
14%
65%
5.4 m/s
0
0
29
December
7°C
5°C
1°C
17%
70%
5.9 m/s
0
0
10
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Sleaford weather by season
Year round, Sleaford has days of about 6°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from 3°C to 15°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Sleaford weather in winterDecember to February
High 7°CLow 4°CRain 15%
Winter in Sleaford has typical daily highs of about 7°C and lows of about 4°C, with a 15% chance of rain on a given day.
Sleaford weather in springMarch to May
High 12°CLow 7°CRain 12%
Spring in Sleaford has typical daily highs of about 12°C and lows of about 7°C, with a 12% chance of rain on a given day.
Sleaford weather in summerJune to August
High 20°CLow 14°CRain 13%
Summer in Sleaford has typical daily highs of about 20°C and lows of about 14°C, with a 13% chance of rain on a given day.
Sleaford weather in autumnSeptember to November
High 14°CLow 9°CRain 14%
Autumn in Sleaford has typical daily highs of about 14°C and lows of about 9°C, with a 14% chance of rain on a given day.
When is the rainy season in Sleaford?
Sleaford has no sharply defined rainy season: the chance of rain on a given day runs from 10% in April, the driest month, to 17% in December, the wettest.
What time of year is Sleaford windiest?
Winds in Sleaford are highest in February, averaging 6.2 m/s (22 km/h), and lightest in July, at 4.6 m/s (17 km/h). The prevailing wind is from the W.
What is the average temperature in Sleaford year round?
The average temperature in Sleaford over the whole year is 11°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about 3°C.