September weather forecastCatalina, AZ
September
Weather in September
September, the first month of the autumn in Catalina, is also a hot month, with temperature in the range of an average low of 70.3°F (21.3°C) and an average high of 88.3°F (31.3°C).Temperature
Catalina's average high-temperature marks a still tropical 88.3°F (31.3°C) with the advent of September, closely mirroring that of the preceding month. During September, the average low-temperature in Catalina, Arizona, is an agreeable 70.3°F (21.3°C).Heat index
For most parts of September, the heat index is appraised at a tropical 87.8°F (31°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in September is 40%.Rainfall
In September, in Catalina, the rain falls for 9.2 days. Throughout September, 1.57" (40mm) of precipitation is accumulated. In Catalina, during the entire year, the rain falls for 76.5 days and collects up to 13.31" (338mm) of precipitation.Snowfall
March through November are months without snowfall in Catalina.Daylight
In September, the average length of the day is 12h and 21min.On the first day of the month, sunrise is at 5:59 am and sunset at 6:47 pm. On the last day of September, sunrise is at 6:17 am and sunset at 6:09 pm MST.
Sunshine
In September, the average sunshine in Catalina is 9.6h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 7 during September leads to these advisories:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Catalina, AZ
- Average high temperature in September: 88.3°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 September: 70.3°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 September
Catalina, AZ
- Average pressure in September: 29.89"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 September
Catalina, AZ
- Average wind speed in September: 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 September
Catalina, AZ
- Average humidity in September: 40%
The month with the highest relative humidity is December (48%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Catalina, AZ
- Average rainfall in September: 1.57"
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 September
Catalina, AZ
- Average rainfall days in September: 9.2 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 September
Catalina, AZ
- Average snowfall in September: 0"
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 September
Catalina, AZ
- Average snowfall days in September: 0 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 September /
Average sunshine in September
Catalina, AZ
- Average daylight in September: 12h and 24min
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 September: 9h 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 September
Catalina, AZ
- Average sunshine days in September: 18.5 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 September
Catalina, AZ
- Average UV index in September: 7
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 September
Catalina, AZ
- Average cloud cover in September: 14
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 September
Catalina, AZ
- Average visibility in September: 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).
