Annual mean 21°C · wettest around May · prevailing wind SE
Warmest
33.3 °C
Coldest
14.9 °C
Wettest
52%
Windiest
5.0 m/s
Prevailing
SE
3.9 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 Katy over the whole year is 21°C. August is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 9°C. Katy has no sharply defined rainy season: the chance of rain on a given day runs from 36% in February, the driest month, to 43% in May, the wettest. Winds in Katy are highest in March, averaging 3.6 m/s (13 km/h), and lightest in August, at 2.2 m/s (8 km/h). The prevailing wind is from the SE. The clearest skies in Katy come in August, when the sky is typically 29% covered; February is the cloudiest month, at 61%.
Month by month Katy 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
15°C
9°C
12°C
40%
51%
3.2 m/s
36
4
62
February
18°C
11°C
15°C
36%
61%
3.5 m/s
51
11
56
March
22°C
15°C
20°C
36%
55%
3.6 m/s
67
23
55
April
25°C
17°C
24°C
38%
53%
3.6 m/s
64
40
37
May
29°C
22°C
29°C
43%
52%
3.2 m/s
29
59
9
June
31°C
24°C
34°C
41%
36%
2.6 m/s
5
33
1
July
32°C
25°C
36°C
40%
30%
2.3 m/s
3
17
0
August
33°C
25°C
36°C
42%
29%
2.2 m/s
3
15
0
September
31°C
23°C
33°C
41%
33%
2.2 m/s
13
39
3
October
27°C
18°C
27°C
40%
36%
2.5 m/s
36
51
22
November
21°C
14°C
20°C
41%
49%
2.6 m/s
56
27
51
December
18°C
11°C
16°C
40%
54%
2.9 m/s
48
11
61
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 Katy weather by season
Year round, Katy has days of about 15°C at their warmest in January, its coolest month, and 33°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 May and least likely around February. 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.
Katy weather in winterDecember to February
High 17°CLow 10°CRain 39%
Winter in Katy has typical daily highs of about 17°C and lows of about 10°C, with a 39% chance of rain on a given day.
Katy weather in springMarch to May
High 25°CLow 18°CRain 39%
Spring in Katy has typical daily highs of about 25°C and lows of about 18°C, with a 39% chance of rain on a given day.
Katy weather in summerJune to August
High 32°CLow 25°CRain 41%
Summer in Katy has typical daily highs of about 32°C and lows of about 25°C, with a 41% chance of rain on a given day.
Katy weather in autumnSeptember to November
High 26°CLow 18°CRain 40%
Autumn in Katy has typical daily highs of about 26°C and lows of about 18°C, with a 40% chance of rain on a given day.
When is the rainy season in Katy?
Katy has no sharply defined rainy season: the chance of rain on a given day runs from 36% in February, the driest month, to 43% in May, the wettest.
What time of year is Katy windiest?
Winds in Katy are highest in March, averaging 3.6 m/s (13 km/h), and lightest in August, at 2.2 m/s (8 km/h). The prevailing wind is from the SE.
What is the average temperature in Katy year round?
The average temperature in Katy over the whole year is 21°C. August is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 9°C.