December weather forecastCatalina, AZ
December
Weather in December
The first month of the winter, December, is still a mild month in Catalina, Arizona, with an average temperature fluctuating between 59.2°F (15.1°C) and 42.3°F (5.7°C).Temperature
The lowest temperatures are recorded in December, with averages reaching a high of 59.2°F (15.1°C) and a low of 42.3°F (5.7°C).Humidity
The most humid month in Catalina, Arizona, is December, with an average relative humidity of 48%.Rainfall
In Catalina, in December, during 6.2 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Catalina, during the entire year, the rain falls for 76.5 days and collects up to 13.31" (338mm) of precipitation.Snowfall
Months with snowfall in Catalina, Arizona, are January, February and December. December is the first month it typically snows in Catalina. Throughout December, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 1.1 snowfall days, and 1.77" (45mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 6min of daylight.On the first day of December in Catalina, sunrise is at 7:08 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:28 pm MST.
Sunshine
December has the least sunshine of the year in Catalina, with an average of 6.6h of sunshine.UV index
The months with the lowest UV index in Catalina are November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 3 transforms into these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Catalina, AZ
- Average high temperature in December: 59.2°F
The warmest month (with the highest average high temperature) is June (95.5°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in December: 42.3°F
The months with the highest average low temperature are July and August (75.4°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in December
Catalina, AZ
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Catalina, AZ
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is May (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Catalina, AZ
- Average humidity in December: 48%
The month with the highest relative humidity is December (48%).
The month with the lowest relative humidity is June (20%).
Average rainfall in December
Catalina, AZ
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is June (0.24").
Average rainfall days in December
Catalina, AZ
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is May (2 days).
Average snowfall in December
Catalina, AZ
- Average snowfall in December: 0.08"
The month with the highest snowfall is January (0.91").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Catalina, AZ
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Catalina, AZ
- Average daylight in December: 10h and 6min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 6h and 36min
The months with the most sunshine are June and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Catalina, AZ
- Average sunshine days in December: 24 days
The month with the most sunshine days is May (28.6 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Catalina, AZ
- Average UV index in December: 3
The month with the highest UV index is June (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in December
Catalina, AZ
- Average cloud cover in December: 23
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is June (Cloud cover 8).
Average visibility in December
Catalina, AZ
- 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).
