How warm is it in Key West in October?

Daytime highs averaged 28.3 °C, night-time lows 27.4 °C. The highest value of the past 10 years was 30.5 °C (12 Oct 2023), the lowest 21.5 °C (30 Oct 2017).

How often does it rain in Key West in October?

On average there were 16.3 rain days (at least 1 mm) with 106 mm of precipitation in total.

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Key West weather in October: temperature & rain

Photo: Juliancolton · Public domain

🇺🇸 Weather in Key West in October

This is what the weather in Key West (Florida, USA) was like in October over the years 2016–2025.

Key facts at a glance

Prevailing weather: Light rain

Avg. daytime high

28.3 °C

27.6 °C – 28.8 °C

Avg. night-time low

27.4 °C

26.4 °C – 28.0 °C

Avg. rain days in period

16.3

53 % of days · ≥ 1.0 mm

Avg. precipitation in period

106 mm

13.9 mm – 311 mm

Avg. cloud cover

57 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 30.5 °C (12 Oct 2023) · Lowest temperature 21.5 °C (30 Oct 2017) · Avg. daily peak wind 26 km/h

Weather mix of all days

58Sunny
65Partly cloudy
24Cloudy
99Light rain
64Rain

Summary

On average 28.3 °C during the day and 27.4 °C at night.
On average 16.3 rain days (Rain day = at least 1.0 mm of precipitation) with 106 mm of precipitation in total.
Prevailing weather: Light rain.
Warmest year: 2020 (avg. 28.8 °C), coolest: 2022 (avg. 27.6 °C).
Wettest year: 2024 (311 mm), driest: 2018 (13.9 mm).
Extremes: 30.5 °C on 12 Oct 2023 and 21.5 °C on 30 Oct 2017.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2025
Avg. max28.5°Avg. min27.5°
Rain days
24 Rain days
Precipitation
101 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 29.7 °C · Min 24.2 °C
2024
Avg. max28.4°Avg. min27.3°
Rain days
29 Rain days
Precipitation
311 mm
Avg. cloud cover
70 % cloudy
Sea temperature
–
Max 30.5 °C · Min 24.9 °C
2023
Avg. max28.4°Avg. min27.4°
Rain days
18 Rain days
Precipitation
88.1 mm
Avg. cloud cover
52 % cloudy
Sea temperature
–
Max 30.5 °C · Min 23.3 °C
2022
Avg. max27.6°Avg. min26.4°
Rain days
11 Rain days
Precipitation
52.9 mm
Avg. cloud cover
43 % cloudy
Sea temperature
–
Max 29.2 °C · Min 22.6 °C
2021
Avg. max28.7°Avg. min27.8°
Rain days
22 Rain days
Precipitation
138 mm
Avg. cloud cover
63 % cloudy
Sea temperature
–
Max 29.7 °C · Min 25.8 °C
2020
Avg. max28.8°Avg. min28.0°
Rain days
24 Rain days
Precipitation
254 mm
Avg. cloud cover
73 % cloudy
Sea temperature
–
Max 29.7 °C · Min 26.9 °C
2019
Avg. max28.8°Avg. min27.9°
Rain days
6 Rain days
Precipitation
21.3 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 29.6 °C · Min 26.5 °C
2018
Avg. max28.3°Avg. min27.5°
Rain days
3 Rain days
Precipitation
13.9 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 29.5 °C · Min 24.1 °C
2017
Avg. max28.0°Avg. min26.9°
Rain days
15 Rain days
Precipitation
42.4 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 29.5 °C · Min 21.5 °C
2016
Avg. max27.9°Avg. min27.0°
Rain days
11 Rain days
Precipitation
34.8 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 29.8 °C · Min 24.0 °C

Frequently asked questions

How warm is it in Key West in October?: Daytime highs averaged 28.3 °C, night-time lows 27.4 °C. The highest value of the past 10 years was 30.5 °C (12 Oct 2023), the lowest 21.5 °C (30 Oct 2017).
How often does it rain in Key West in October?: On average there were 16.3 rain days (at least 1 mm) with 106 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)