How warm is it in Key West in June?

Daytime highs averaged 29.1 °C, night-time lows 28.3 °C. The highest value of the past 10 years was 31.1 °C (24 Jun 2023), the lowest 25.9 °C (3 Jun 2022).

How often does it rain in Key West in June?

On average there were 21.0 rain days (at least 1 mm) with 238 mm of precipitation in total.

How warm is the sea in Key West in June?

The sea temperature averaged 29.5 °C (open-sea point approx. 3 km from the town).

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Key West weather in June: temperature & rain

Photo: Juliancolton · Public domain

🇺🇸 Weather in Key West in June

This is what the weather in Key West (Florida, USA) was like in June over the years 2017–2026.

Key facts at a glance

Prevailing weather: Rain

Avg. daytime high

29.1 °C

28.4 °C – 29.7 °C

Avg. night-time low

28.3 °C

27.7 °C – 28.8 °C

Avg. rain days in period

21.0

70 % of days · ≥ 1.0 mm

Avg. precipitation in period

238 mm

25.7 mm – 743 mm

Avg. cloud cover

64 %

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

Avg. sea temperature

29.5 °C

Sea measuring point approx. 3 km from the location

Extremes: Highest temperature 31.1 °C (24 Jun 2023) · Lowest temperature 25.9 °C (3 Jun 2022) · Avg. daily peak wind 21 km/h

Weather mix of all days

20Sunny
41Partly cloudy
29Cloudy
99Light rain
111Rain

Summary

On average 29.1 °C during the day and 28.3 °C at night.
On average 21.0 rain days (Rain day = at least 1.0 mm of precipitation) with 238 mm of precipitation in total.
The sea averaged 29.5 °C.
Prevailing weather: Rain.
Warmest year: 2023 (avg. 29.7 °C), coolest: 2018 (avg. 28.4 °C).
Wettest year: 2024 (743 mm), driest: 2018 (25.7 mm).
Extremes: 31.1 °C on 24 Jun 2023 and 25.9 °C on 3 Jun 2022.

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

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max29.6°Avg. min28.7°
Rain days
19 Rain days
Precipitation
262 mm
Avg. cloud cover
60 % cloudy
Sea temperature
29.6 °C
Max 31.0 °C · Min 26.7 °C
2025
Avg. max29.3°Avg. min28.5°
Rain days
25 Rain days
Precipitation
183 mm
Avg. cloud cover
53 % cloudy
Sea temperature
29.2 °C
Max 30.0 °C · Min 27.0 °C
2024
Avg. max29.5°Avg. min28.6°
Rain days
30 Rain days
Precipitation
743 mm
Avg. cloud cover
61 % cloudy
Sea temperature
29.7 °C
Max 30.5 °C · Min 27.7 °C
2023
Avg. max29.7°Avg. min28.8°
Rain days
28 Rain days
Precipitation
206 mm
Avg. cloud cover
54 % cloudy
Sea temperature
30.5 °C
Max 31.1 °C · Min 27.4 °C
2022
Avg. max29.0°Avg. min28.0°
Rain days
26 Rain days
Precipitation
311 mm
Avg. cloud cover
63 % cloudy
Sea temperature
29.4 °C
Max 30.0 °C · Min 25.9 °C
2021
Avg. max28.5°Avg. min27.8°
Rain days
28 Rain days
Precipitation
337 mm
Avg. cloud cover
81 % cloudy
Sea temperature
29.0 °C
Max 29.5 °C · Min 26.6 °C
2020
Avg. max29.0°Avg. min28.2°
Rain days
23 Rain days
Precipitation
249 mm
Avg. cloud cover
72 % cloudy
Sea temperature
29.6 °C
Max 29.9 °C · Min 27.1 °C
2019
Avg. max29.4°Avg. min28.5°
Rain days
11 Rain days
Precipitation
26.5 mm
Avg. cloud cover
56 % cloudy
Sea temperature
30.0 °C
Max 30.3 °C · Min 27.2 °C
2018
Avg. max28.4°Avg. min27.7°
Rain days
8 Rain days
Precipitation
25.7 mm
Avg. cloud cover
76 % cloudy
Sea temperature
29.0 °C
Max 29.4 °C · Min 26.5 °C
2017
Avg. max28.5°Avg. min27.8°
Rain days
12 Rain days
Precipitation
41.3 mm
Avg. cloud cover
70 % cloudy
Sea temperature
29.1 °C
Max 29.1 °C · Min 26.9 °C

Frequently asked questions

How warm is it in Key West in June?: Daytime highs averaged 29.1 °C, night-time lows 28.3 °C. The highest value of the past 10 years was 31.1 °C (24 Jun 2023), the lowest 25.9 °C (3 Jun 2022).
How often does it rain in Key West in June?: On average there were 21.0 rain days (at least 1 mm) with 238 mm of precipitation in total.
How warm is the sea in Key West in June?: The sea temperature averaged 29.5 °C (open-sea point approx. 3 km from the town).

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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); Sea measuring point approx. 3 km from the location (24.590, -81.780)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)