Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
San Leon records a mild change in average high-temperature during December, easing from a pleasant 68.9°F (20.5°C) in November to an enjoyable 62.2°F (16.8°C). Throughout the month of December, San Leon reports a steady low-temperature average of 52.7°F (11.5°C).Humidity
In San Leon, Texas, the average relative humidity in December is 78%.Rainfall
In San Leon, Texas, during December, the rain falls for 15.3 days and regularly aggregates up to 2.68" (68mm) of precipitation. In San Leon, during the entire year, the rain falls for 188.2 days and collects up to 44.13" (1121mm) of precipitation.Snowfall
In San Leon, snow does not fall in February through December.Ocean temperature
In December, the average ocean temperature in San Leon is 60.4°F (15.8°C).Note: The enjoyment of swimming decreases for most when the surface water temperature is 60.4°F (15.8°C). Breathing control becomes increasingly challenging as temperatures descend below 69.8°F (21°C).
Daylight
With an average of 10h and 18min of daylight, December has the shortest days of the year in San Leon.On the first day of December in San Leon, sunrise is at 6:57 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:31 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 4.9h of sunshine.UV index
December is the month with the lowest UV index in San Leon, Texas, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What are December temperatures in San Leon?
What is the average humidity in December in San Leon?
How many days does it rain in December in San Leon?
When it does not snow in San Leon?
Does it snow in San Leon in December?
What is the ocean temperature in December in San Leon?
What is the month with the shortest days in San Leon?
How many hours of daylight does San Leon have in December?
When is the sunrise / sunset in December in San Leon?
What is the month with the least sunshine in San Leon?
How many hours of sunshine does San Leon have in December?
What is the month with the lowest UV index in San Leon?
What is the UV index reading in December in San Leon?
Average temperature in December
San Leon, TX
- Average high temperature in December: 62.2°F
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).
- Average low temperature in December: 52.7°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 in December
San Leon, TX
- 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 in December
San Leon, TX
- 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 in December
San Leon, TX
- Average humidity in December: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
San Leon, TX
- 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 in December
San Leon, TX
- 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 in December
San Leon, TX
- Average snowfall in December: 0"
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 in December
San Leon, TX
- 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 in December
San Leon, TX
- Average sea temperature in December: 60.3°F
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 in December /
Average sunshine in December
San Leon, TX
- Average daylight in December: 10h and 2min
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 December: 4h and 5min
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 in December
San Leon, TX
- 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 in December
San Leon, TX
- Average UV index in December: 3
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 in December
San Leon, TX
- Average cloud cover in December: 48
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 in December
San Leon, TX
- Average visibility in December: 6mi
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).
San Leon, Texas, USA
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