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 sea temperature 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 in Haines subtly indicates a reduction in the average high-temperature, down to a chilly 47.3°F (8.5°C) from August's fresh 55°F (12.8°C). During the month of September, Haines identifies an average nighttime low-temperature of 38.7°F (3.7°C), slightly lower than its daytime counterpart.Humidity
In Haines, Alaska, the average relative humidity in September is 84%.Rainfall
In Haines, Alaska, during September, the rain falls for 19.5 days and regularly aggregates up to 4.65" (118mm) of precipitation. In Haines, during the entire year, the rain falls for 200.4 days and collects up to 48.03" (1220mm) of precipitation.Snowfall
In Haines, snow does not fall in June through September.Ocean temperature
In September, the average ocean temperature in Haines is 50.5°F (10.3°C).Note: Dipping into 50.5°F (10.3°C) below 50°F (10°C) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 55.4°F (13°C) feels cold to the bone.
Daylight
The average length of the day in September in Haines is 12h and 48min.On the first day of the month, sunrise is at 6:01 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:36 pm AKDT.
Sunshine
The average sunshine in September is 6.4h.UV index
The average daily maximum UV index in September in Haines, Alaska, is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 2 transforms into the following advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What is the usual temperature for Haines in September?
What is the average humidity in September in Haines?
How many days does it rain in September in Haines?
When it does not snow in Haines?
Does it snow in Haines in September?
What is the ocean temperature in September in Haines?
How many hours of daylight does Haines have in September?
What time are sunrise and sunset in September in Haines?
How many hours of sunshine does Haines have in September?
What is the UV index reading in September in Haines?
Average temperature in September
Haines, AK
- Average high temperature in September: 47.3°F
The warmest month (with the highest average high temperature) is July (56.5°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in September: 38.7°F
The month with the highest average low temperature is August (44.1°F).
The coldest month (with the lowest average low temperature) is February (12.4°F).
Average pressure in September
Haines, AK
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is July (30.01"Hg).
The month with the lowest atmospheric pressure is November (29.81"Hg).
Average wind speed in September
Haines, AK
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is January (6.7mph).
The calmest month (with the lowest average wind speed) is May (4.7mph).
Average humidity in September
Haines, AK
- Average humidity in September: 84%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Haines, AK
- Average rainfall in September: 4.65"
The wettest month (with the highest rainfall) is November (5.87").
The driest month (with the least rainfall) is June (2.2").
Average rainfall days in September
Haines, AK
- Average rainfall days in September: 19.5 days
The month with the highest number of rainy days is October (20.2 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Haines, AK
- Average snowfall in September: 0"
The month with the highest snowfall is December (21.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Haines, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Haines, AK
- Average sea temperature in September: 50.5°F
The best month for swimming (with the highest average sea temperature) is August (53.1°F).
The coldest month (with the lowest average sea temperature) is March (39.6°F).
Average daylight in September /
Average sunshine in September
Haines, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Haines, AK
- Average sunshine days in September: 8.2 days
The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is June (6.3 days).
Average UV index in September
Haines, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in September
Haines, AK
- Average cloud cover in September: 59
The month with the most cloud cover is December (Cloud cover 63).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in September
Haines, AK
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Haines, Alaska, USA
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