Climate and monthly weather forecastSan Leon, TX
Climate and monthly weather forecast
Weather in January
January, like December, is another refreshing winter month in San Leon, Texas, with an average temperature varying between 59.5°F (15.3°C) and 49.5°F (9.7°C). January is the coldest month of the year, registering average temperatures as high as 59.5°F (15.3°C) and as low as 49.5°F (9.7°C). Weather in January »Weather in February
February, the last month of the winter in San Leon, is a comfortable month, with an average temperature varying between 53.4°F (11.9°C) and 62.6°F (17°C). Transitioning into February, San Leon records an average high-temperature of an enjoyable 62.6°F (17°C), almost identical to January's 59.5°F (15.3°C). Weather in February »Weather in March
March, the first month of the spring in San Leon, is an agreeable month, with an average temperature fluctuating between 59.4°F (15.2°C) and 68.5°F (20.3°C). The onset of March introduces a subtle rise in the average high-temperature, nudging from a comfortable 62.6°F (17°C) in February to a pleasant 68.5°F (20.3°C). Weather in March »Weather in April
April in San Leon, Texas, is a warm spring month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 74.8°F (23.8°C). With the onset of April, San Leon experiences a subtle temperature shift, with the average high-temperature moving from a pleasant 68.5°F (20.3°C) in March to a moderately hot 74.8°F (23.8°C). Weather in April »Weather in May
May, the last month of the spring in San Leon, is also a moderately hot month, with an average temperature ranging between max 81.3°F (27.4°C) and min 72.5°F (22.5°C). A slight uplift of average high-temperatures is noted in May, with temperatures adjusting from a moderately hot 74.8°F (23.8°C) in April to a still warm 81.3°F (27.4°C). Weather in May »Weather in June
The first month of the summer, June, is a hot month in San Leon, Texas, with an average temperature varying between 78.8°F (26°C) and 86.7°F (30.4°C). In San Leon, the average high-temperature in June slightly increases from a moderately hot 81.3°F (27.4°C) in May to a hot 86.7°F (30.4°C). Weather in June »Weather in July
July, like June, is another hot summer month in San Leon, Texas, with an average temperature ranging between min 80.2°F (26.8°C) and max 88.3°F (31.3°C). San Leon records a slight change with July's average high-temperatures adjusting to a still tropical 88.3°F (31.3°C) from June's 86.7°F (30.4°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in San Leon, Texas, with temperature in the range of an average high of 89.2°F (31.8°C) and an average low of 80.2°F (26.8°C). San Leon registers the highest average temperatures during the month of August, with peaks of 89.2°F (31.8°C) and lows of 80.2°F (26.8°C). In August, the heat index is calculated to be a blistering 105.8°F (41°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in San Leon, Texas, with an average temperature fluctuating between 76.8°F (24.9°C) and 85.5°F (29.7°C). San Leon records an average high-temperature of a moderately hot 85.5°F (29.7°C) as September arrives, nearly mirroring the previous month's climate. Weather in September »Weather in October
October, like September, in San Leon, Texas, is another warm autumn month, with temperature in the range of an average low of 68.7°F (20.4°C) and an average high of 78.8°F (26°C). The commencement of October indicates a gentle shift in the average high-temperature, receding from September's moderately hot 85.5°F (29.7°C) to a still warm 78.8°F (26°C). Weather in October »Weather in November
November, the last month of the autumn in San Leon, is also an agreeable month, with an average temperature fluctuating between 68.9°F (20.5°C) and 58.8°F (14.9°C). November involves a decrease in temperature, down from a warm 78.8°F (26°C) in October to an agreeable 68.9°F (20.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a refreshing month in San Leon, Texas, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 62.2°F (16.8°C). December's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from November's agreeable 68.9°F (20.5°C) to a refreshing 62.2°F (16.8°C). Weather in December »Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January proves to be the coldest month, recording an average maximum temperature of 59.5°F (15.3°C) and a minimum temperature of 49.5°F (9.7°C).
Throughout the year, there are 188.2 rainfall days, and 44.13" (1121mm) of precipitation is accumulated.
January is the only month when snow falls.
The month with the most snowfall in San Leon is January, when snow falls for 0.3 days and typically aggregates up to 0.04" (1mm) of snow.
In San Leon, during the entire year, snow falls for 0.4 days and aggregates up to 0.04" (1mm) of snow.
With an average ocean temperature of 56.5°F (13.6°C), January is the month with the coldest seawater.
The most humid month is February, with an average relative humidity of 81%.
In San Leon, snow does not fall in February through December.
March is the month with the least rainfall. Rain falls for 14 days and accumulates 1.81" (46mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The months with the highest UV index are May through August, with an average maximum UV index of 7.
With an average of 14h and 0min of daylight, June has the longest days of the year.
July and August, with an average of 10.7h of sunshine, are months with the most sunshine.
In San Leon, August registers the highest temperatures, averaging 89.2°F (31.8°C) at the peak and 80.2°F (26.8°C) at the lowest.
With an average ocean temperature of 87.3°F (30.7°C), August is the month with the warmest seawater.
The month with the most rainfall in San Leon is September, when the rain falls for 20.5 days and typically aggregates up to 6.77" (172mm) of precipitation.
The least humid month is October, with an average relative humidity of 72%.
The month with the shortest days in San Leon is December, with an average of 10h and 18min of daylight.
The month with the least sunshine is December, with an average of 4.9h of sunshine.
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
San Leon, TX
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is January (59.5°F).
The months with the highest average low temperature are July and August (80.2°F).
The coldest month (with the lowest average low temperature) is January (49.5°F).
Average pressure
San Leon, TX
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
San Leon, TX
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
11.4mph - Average wind speed in May:
10.7mph - Average wind speed in June:
9.4mph
- Average wind speed in July:
8.6mph - Average wind speed in August:
8.3mph - Average wind speed in September:
8.3mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.5mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest months (with the lowest average wind speed) are August and September (8.3mph).
Average humidity
San Leon, TX
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall
San Leon, TX
- Average rainfall in January:
2.36" - Average rainfall in February:
1.89" - Average rainfall in March:
1.81" - Average rainfall in April:
2.32" - Average rainfall in May:
4.33" - Average rainfall in June:
4.41"
- Average rainfall in July:
5.24" - Average rainfall in August:
6.3" - Average rainfall in September:
6.77" - Average rainfall in October:
3.58" - Average rainfall in November:
2.44" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is September (6.77").
The driest month (with the least rainfall) is March (1.81").
Average rainfall days
San Leon, TX
- Average rainfall days in January:
12.6 days - Average rainfall days in February:
13.5 days - Average rainfall days in March:
14 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
13.7 days - Average rainfall days in June:
17.8 days
- Average rainfall days in July:
19.9 days - Average rainfall days in August:
22.1 days - Average rainfall days in September:
20.5 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
11.6 days - Average rainfall days in December:
15.3 days
The month with the highest number of rainy days is August (22.1 days).
The month with the least rainy days is November (11.6 days).
Average snowfall
San Leon, TX
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
San Leon, TX
- Average snowfall days in January:
0.3 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature
San Leon, TX
The best month for swimming (with the highest average sea temperature) is August (87.2°F).
The coldest month (with the lowest average sea temperature) is January (56.5°F).
Average daylight / Average sunshine
San Leon, TX
- Average daylight in January:
10h and 30min - Average daylight in February:
11h and 12min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 36min - Average daylight in June:
14h and 0min
- Average daylight in July:
13h and 48min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 42min - Average daylight in December:
10h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
5h and 48min - Average sunshine in March:
7h and 0min - Average sunshine in April:
8h and 36min - Average sunshine in May:
10h and 0min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 42min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 48min - Average sunshine in November:
5h and 42min - Average sunshine in December:
4h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days
San Leon, TX
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
11 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
13.9 days - Average sunshine days in June:
8 days
- Average sunshine days in July:
7.9 days - Average sunshine days in August:
6.3 days - Average sunshine days in September:
7.9 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
15.4 days - Average sunshine days in December:
13.5 days
The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is August (6.3 days).
Average UV index
San Leon, TX
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
San Leon, TX
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility
San Leon, TX
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
