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
September in Hannibal heralds a minor drop in average high-temperature, sliding from August's 83.8°F (28.8°C) to a still moderately hot 78.4°F (25.8°C). September brings Hannibal a consistent average low-temperature of 58.3°F (14.6°C).Humidity
In Hannibal, the average relative humidity in September is 74%.Rainfall
In Hannibal, Missouri, in September, during 11.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. Throughout the year, there are 136 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
In Hannibal, snow does not fall in May through October.Daylight
In Hannibal, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:48 pm CDT.
Sunshine
In Hannibal, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What are the temperatures in Hannibal in September?
What is the average humidity in September in Hannibal?
How much does it rain in Hannibal in September?
When it does not snow in Hannibal?
What is the average length of the day in September in Hannibal?
What time are sunrise and sunset in September in Hannibal?
How long on average sun shines in September in Hannibal?
How high is the UV index in September in Hannibal?
Average temperature in September
Hannibal, MO
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Hannibal, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Hannibal, MO
- Average wind speed in September: 7mph
The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
Hannibal, MO
- Average humidity in September: 74%
The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Hannibal, MO
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in September
Hannibal, MO
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Hannibal, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Hannibal, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hannibal, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Hannibal, MO
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Hannibal, MO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Hannibal, MO
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Hannibal, MO
- 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).
Hannibal, Missouri, USA
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