September weather forecastMontrose, CA
September
Weather in September
September, the first month of the autumn in Montrose, is still a warm month, with an average temperature varying between 63.1°F (17.3°C) and 83.8°F (28.8°C).Temperature
With the onset of September, Montrose's average high-temperature clocks in at a still warm 83.8°F (28.8°C), showing a minor fluctuation from the previous month. In the month of September, an average of 63.1°F (17.3°C) marks the low-temperature.Heat index
In September, the heat index is evaluated at a tropical 86°F (30°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely vital to babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In September, the average relative humidity is 52%.Rainfall
In Montrose, during September, the rain falls for 2.9 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Montrose, during the entire year, the rain falls for 50.4 days and collects up to 8.35" (212mm) of precipitation.Snowfall
January through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:47 am and sunset at 6:37 pm PDT.
Sunshine
In Montrose, the average sunshine in September is 10.8h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Montrose, CA
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in September: 63.1°F
The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (47.3°F).
Average pressure in September
Montrose, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Montrose, CA
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in September
Montrose, CA
- Average humidity in September: 52%
The month with the highest relative humidity is June (60%).
The month with the lowest relative humidity is November (48%).
Average rainfall in September
Montrose, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Montrose, CA
- Average rainfall days in September: 2.9 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.1 days).
Average snowfall days in September
Montrose, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Montrose, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in September
Montrose, CA
- Average sunshine days in September: 25 days
The month with the most sunshine days is June (26.9 days).
The month with the least sunshine days is February (21 days).
Average UV index in September
Montrose, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Montrose, CA
- Average cloud cover in September: 7
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Montrose, 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).
