Weather in Key Largo in September 2018

  • 32°C maximum daytime temperature in September in Key Largo32
    32°C max day temperature
  • 9 hours of sunshine per day (69% of daylight hours) in September in Key Largo9
    9 hours of sunshine per day
  • 17 days with some rainfall in September in Key Largo17
    17 days with some rainfall
  • 23°C minimum night-time temperature in September in Key Largo23
    23°C min night temperature
  • 12 hours of daylight per day in September in Key Largo12
    12 hours of daylight per day
  • Very high heat & humidity in September in Key LargoVH
    Very High heat & humidity
  • 213 mm monthly rainfall in September in Key Largo213
    213 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Key Largo10
    10 (Very High) UV index
  • 29°C sea temperature in September in Key Largo29
    29°C sea temperature

Expect 32°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Key Largo in September. Check more long-term weather averages for Key Largo in September before you book your next holiday to Florida in 2018.

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Guide to Key Largo weather in September

The average maximum daytime temperature in Key Largo in September is a hot 32°C (90°F) with very high heat & humidity. The average night-time temperature is usually a warm 23°C (73°F). There are usually 9 hours of bright sunshine each day, which represents 69% of the 12 hours of daylight.

Expect 213mm (8.4 inches) of rainfall across the whole of September with 17 days with some rain falling. Maximum UV levels will be very high (10 UV index) at midday when the skies are clear.

The average sea temperature in and around Key Largo in September is 29°C (84°F).

The weather in Key Largo in September is represented by Key Largo.

Key Largo sunrise & sunset times for September 2018

Browse the sunrise & sunset times for Key Largo in September 2018. Select a month to view Key Largo sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Saturday, 1st September 2018 07:03 19:40
Sunday, 2nd September 2018 07:03 19:39
Monday, 3rd September 2018 07:03 19:38
Tuesday, 4th September 2018 07:04 19:37
Wednesday, 5th September 2018 07:04 19:36
Thursday, 6th September 2018 07:04 19:35
Friday, 7th September 2018 07:05 19:34
Saturday, 8th September 2018 07:05 19:33
Sunday, 9th September 2018 07:06 19:32
Monday, 10th September 2018 07:06 19:31
Tuesday, 11th September 2018 07:06 19:30
Wednesday, 12th September 2018 07:07 19:29
Thursday, 13th September 2018 07:07 19:28
Friday, 14th September 2018 07:07 19:27
Saturday, 15th September 2018 07:08 19:26
Sunday, 16th September 2018 07:08 19:25
Monday, 17th September 2018 07:08 19:23
Tuesday, 18th September 2018 07:09 19:22
Wednesday, 19th September 2018 07:09 19:21
Thursday, 20th September 2018 07:10 19:20
Friday, 21st September 2018 07:10 19:19
Saturday, 22nd September 2018 07:10 19:18
Sunday, 23rd September 2018 07:11 19:17
Monday, 24th September 2018 07:11 19:16
Tuesday, 25th September 2018 07:11 19:15
Wednesday, 26th September 2018 07:12 19:14
Thursday, 27th September 2018 07:12 19:13
Friday, 28th September 2018 07:13 19:12
Saturday, 29th September 2018 07:13 19:11
Sunday, 30th September 2018 07:13 19:09
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Key Largo weather by month

Check Key Largo weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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