September weather forecastHollister, OK
September
Weather in September
September in Hollister, Oklahoma, brings a notable decline in temperatures from August, delivering an average high temperature of 86.9°F (30.5°C) and a night low of 68.4°F (20.2°C). This heralds the arrival of fall, a transition from the captivating heat of summer to cooler, calmer temperatures. Despite the retreat in temperature, the city remains mostly sunny with consistent daylight hours and reduced cloud cover. Rainfall starts to taper off from its peak of the wet season, although Hollister continues to enjoy plenty of sunshine. The weather in September in Hollister is mildly warm, inviting, and symbolizes the slowing pace of the seasonal pendulum as it swings toward autumn.Temperature
Observing a mild shift, the average high-temperature during September reduces from August's sweltering 96.6°F (35.9°C) to a hot 86.9°F (30.5°C). In September, Hollister reports a consistent average low-temperature of 68.4°F (20.2°C) during the nights.Heat index
The heat index value during September is appraised at a hot 93.2°F (34°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.Heat index data is primarily for areas with shade and subjected to light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. 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 hold particular importance for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In September, the average relative humidity is 59%.Rainfall
In Hollister, in September, it is raining for 12 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, there are 102.6 rainfall days, and 20.55" (522mm) of precipitation is accumulated.Snowfall
In Hollister, snow does not fall in May through October.Daylight
In Hollister, Oklahoma, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 7:09 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:20 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 in September translates into these instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hollister, OK
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (96.8°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in September: 68.4°F
The month with the highest average low temperature is July (76.6°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Hollister, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Hollister, OK
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest months (with the lowest average wind speed) are August and September (8.8mph).
Average humidity in September
Hollister, OK
- Average humidity in September: 59%
The months with the highest relative humidity are May and December (62%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Hollister, OK
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is November (0.79").
Average rainfall days in September
Hollister, OK
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Hollister, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Hollister, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Hollister, OK
- 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: 8h and 42min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Hollister, OK
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (25.5 days).
The month with the least sunshine days is September (15.9 days).
Average UV index in September
Hollister, OK
- Average UV index in September: 6
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 2).
Average cloud cover in September
Hollister, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are June and August (Cloud cover 18).
Average visibility in September
Hollister, OK
- 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).
