September weather forecast
Mexico, ME

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Weather in September

September marks the arrival of fall in Mexico, Maine, replacing summer's persistent heat with a pleasingly moderate climate. Temperatures begin to plummet to average highs of 68°F (20°C), depicting a significant dip from the hot August weather. The rapidly shortening days of September stand as a harbinger for the approaching winter season. October, the subsequent month, continues painting the landscape in shades of red and gold. The fall foliage in September offers a vivid array of colours, marking it as the season of harvest.

Temperature

September is characterized by a mild reduction in the average high-temperature, from a warm 75.6°F (24.2°C) in August to a pleasant 68°F (20°C). Mexico throughout September, experiences an average nighttime temperature of 47.3°F (8.5°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Mexico, in September, during 11 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Mexico, during the entire year, the rain falls for 146.3 days and collects up to 28.31" (719mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 31min.
On the first day of the month, sunrise is at 6:05 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:39 am and sunset at 6:24 pm EDT.

Sunshine

The average sunshine in September is 8.2h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 3 in September transforms into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun is at its strongest around midday, find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

An average high-temperature, in September, in Mexico, is 68°F (20°C) and the average low-temperature is 47.3°F (8.5°C).

What is the average humidity in September?

In Mexico, the average relative humidity in September is 79%.

How many days does it rain in September?

In Mexico, in September, during 11 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

When it does not snow?

In Mexico, snow does not fall in June through September.

Does it snow in September?

In Mexico, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Mexico have in September?

In Mexico, the average day length in September is 12h and 31min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:05 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:24 pm EDT.

How many hours of sunshine does Mexico have in September?

The average sunshine duration in September is 8.2h.

What is the UV index reading in September?

In Mexico, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mexico, ME

Average temperature in September - Mexico, ME
  • Average high temperature in September: 68°F

The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (23.7°F).

  • Average low temperature in September: 47.3°F

The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (10°F).

Average pressure in September
Mexico, ME

Average pressure in September - Mexico, ME
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Mexico, ME

Average wind speed in September - Mexico, ME
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is March (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in September
Mexico, ME

Average humidity in September - Mexico, ME
  • Average humidity in September: 79%

The months with the highest relative humidity are January, February and March (86%).
The months with the lowest relative humidity are May and November (76%).

Average rainfall in September
Mexico, ME

Average rainfall in September - Mexico, ME
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is October (3.31").
The driest month (with the least rainfall) is July (1.85").

Average rainfall days in September
Mexico, ME

Average rainfall days in September - Mexico, ME
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is February (8.2 days).

Average snowfall in September
Mexico, ME

Average snowfall in September - Mexico, ME
  • Average snowfall in September: 0"

The month with the highest snowfall is February (12.28").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Mexico, ME

Average snowfall days in September - Mexico, ME
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Mexico, ME

Average daylight in September / Average sunshine in September - Mexico, ME
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

Average sunshine days in September
Mexico, ME

Average sunshine days in September - Mexico, ME
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is September (16.7 days).
The months with the least sunshine days are February and April (11.3 days).

Average UV index in September
Mexico, ME

Average UV index in September - Mexico, ME
  • Average UV index in September: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).

Average cloud cover in September
Mexico, ME

Average cloud cover in September - Mexico, ME
  • Average cloud cover in September: 40

The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 40).

Average visibility in September
Mexico, ME

Average visibility in September - Mexico, ME
  • Average visibility in September: 4mi

The months with the highest visibility are May, June, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, July, August and September (4mi).

Mexico, Maine, USA

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