Annual mean 21°C · wettest around July · prevailing wind E
Warmest
31.6 °C
Coldest
14.1 °C
Wettest
47%
Windiest
4.6 m/s
Prevailing
E
3.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Slidell over the whole year is 21°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 9°C. Slidell has no sharply defined rainy season: the chance of rain on a given day runs from 38% in October, the driest month, to 47% in July, the wettest. Winds in Slidell are highest in February, averaging 3.5 m/s (13 km/h), and lightest in July, at 2.1 m/s (8 km/h). The prevailing wind is from the E. The clearest skies in Slidell come in September, when the sky is typically 24% covered; February is the cloudiest month, at 43%.
Month by month Slidell 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
14°C
9°C
12°C
44%
36%
3.3 m/s
35
4
62
February
18°C
12°C
16°C
44%
43%
3.5 m/s
52
12
61
March
21°C
15°C
20°C
42%
38%
3.5 m/s
65
24
57
April
24°C
17°C
22°C
40%
32%
3.4 m/s
73
34
48
May
28°C
22°C
29°C
43%
29%
2.8 m/s
33
63
11
June
30°C
25°C
33°C
46%
26%
2.5 m/s
5
39
1
July
28°C
23°C
31°C
47%
25%
2.1 m/s
4
24
0
August
31°C
25°C
34°C
44%
25%
2.2 m/s
2
25
0
September
30°C
23°C
32°C
41%
24%
2.4 m/s
13
45
5
October
26°C
18°C
26°C
38%
26%
2.8 m/s
46
54
26
November
20°C
13°C
19°C
41%
33%
2.9 m/s
60
20
60
December
16°C
11°C
15°C
45%
40%
3.0 m/s
45
9
62
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 Slidell weather by season
Year round, Slidell has days of about 14°C at their warmest in January, its coolest month, and 31°C in August, its warmest; the coolest hours of the day run from 9°C to 25°C through the year, and the average temperature over the year is 21°C around the clock. Rain is most likely around July and least likely around October. 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.
Slidell weather in winterDecember to February
High 16°CLow 11°CRain 44%
Winter in Slidell has typical daily highs of about 16°C and lows of about 11°C, with a 44% chance of rain on a given day.
Slidell weather in springMarch to May
High 24°CLow 18°CRain 42%
Spring in Slidell has typical daily highs of about 24°C and lows of about 18°C, with a 42% chance of rain on a given day.
Slidell weather in summerJune to August
High 30°CLow 24°CRain 46%
Summer in Slidell has typical daily highs of about 30°C and lows of about 24°C, with a 46% chance of rain on a given day.
Slidell weather in autumnSeptember to November
High 25°CLow 18°CRain 40%
Autumn in Slidell has typical daily highs of about 25°C and lows of about 18°C, with a 40% chance of rain on a given day.
When is the rainy season in Slidell?
Slidell has no sharply defined rainy season: the chance of rain on a given day runs from 38% in October, the driest month, to 47% in July, the wettest.
What time of year is Slidell windiest?
Winds in Slidell are highest in February, averaging 3.5 m/s (13 km/h), and lightest in July, at 2.1 m/s (8 km/h). The prevailing wind is from the E.
What is the average temperature in Slidell year round?
The average temperature in Slidell over the whole year is 21°C. August is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 9°C.