Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition into September is marked with an average high-temperature of a warm 84.4°F (29.1°C), showing an insignificant shift from August's 86.9°F (30.5°C). September nights are characterized by a significant departure from the daytime highs, dropping to an average temperature of 61.7°F (16.5°C).Heat index
For September, the heat index is evaluated at a tropical 87.8°F (31°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
Humidity
In Palomar Mountain, the average relative humidity in September is 56%.Rainfall
In Palomar Mountain, in September, it is raining for 3.9 days, with typically 0.24" (6mm) of accumulated precipitation. In Palomar Mountain, during the entire year, the rain falls for 51.6 days and collects up to 5.59" (142mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Palomar Mountain, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:22 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm PDT.
Sunshine
The average sunshine in September is 10.5h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 6 in September translates into these instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Palomar Mountain?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Palomar Mountain have in September?
What are the months with the highest UV index?
What is the UV index reading in September?
Average temperature in September
Palomar Mountain, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (86.9°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is February (44.6°F).
Average pressure in September
Palomar Mountain, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Palomar Mountain, CA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is September (4.2mph).
Average humidity in September
Palomar Mountain, CA
- Average humidity in September: 56%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (52%).
Average rainfall in September
Palomar Mountain, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is February (0.94").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Palomar Mountain, CA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.3 days).
Average snowfall in September
Palomar Mountain, CA
- Average snowfall in September: 0"
The month with the highest snowfall is March (9.4").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Palomar Mountain, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Palomar Mountain, CA
- Average daylight in September: 12h and 2min
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 0min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Palomar Mountain, CA
- Average sunshine days in September: 24.8 days
The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in September
Palomar Mountain, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Palomar Mountain, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Palomar Mountain, CA
- 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).
Palomar Mountain, California, USA
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