June weather forecast
Charlestown, MD

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Weather in June

June, the first month of the summer in Charlestown, is a moderately hot month, with an average temperature ranging between max 79.5°F (26.4°C) and min 62.4°F (16.9°C).

Temperature

In Charlestown, the average high-temperature in June slightly rises, from an agreeable 71.6°F (22°C) in May, to a warm 79.5°F (26.4°C). In June, the nighttime temperature in Charlestown lowers to an average of 62.4°F (16.9°C).

Humidity

The months with the highest humidity in Charlestown, Maryland, are May and June, with an average relative humidity of 79%.

Rainfall

In Charlestown, during June, the rain falls for 15.3 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Charlestown, Maryland, during the entire year, the rain falls for 150.3 days and collects up to 29.25" (743mm) of precipitation.

Snowfall

In Charlestown, Maryland, snow does not fall in April, June through October.

Ocean temperature

In Charlestown, Maryland, the average seawater temperature in June is 66.6°F (19.2°C).
Note: Swimming in 66.6°F (19.2°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

With an average of 14h and 54min of daylight, June has the longest days of the year in Charlestown.
On the first day of June, sunrise is at 5:38 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:35 pm EDT.

Sunshine

The average sunshine in June is 10.1h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 6 during June morphs into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

What are June temperatures in Charlestown?

In June, the average high-temperature and low-temperature are 79.5°F (26.4°C) and 62.4°F (16.9°C) respectively.

What is the most humid month in Charlestown?

May and June, with an average relative humidity of 79%, are most humid months.

What is the average humidity in June in Charlestown?

In June, the average relative humidity in Charlestown is 79%.

How much does it rain in Charlestown in June?

In Charlestown, Maryland, in June, it is raining for 15.3 days, with typically 2.6" (66mm) of accumulated precipitation.

When it does not snow in Charlestown?

In Charlestown, Maryland, snow does not fall in April, June through October.

Does it snow in Charlestown in June?

In June, in Charlestown, it doesn't snow. May is the latest month when it typically snows.

What is the ocean temperature in June in Charlestown?

In June, the average ocean temperature is 66.6°F (19.2°C). For most, swimming in 66.6°F (19.2°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

When are the longest days in Charlestown?

The month with the longest days is June, with an average of 14h and 54min of daylight.

What is the average length of the day in June in Charlestown?

In Charlestown, the average day length in June is 14h and 55min.

When are sunrise and sunset in June in Charlestown?

In June, on the first day of the month, sunrise is at 5:38 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:35 pm EDT.

How long on average sun shines in June in Charlestown?

In June, the average sunshine duration in Charlestown is 10.1h.

What is the month with the highest UV index in Charlestown?

The months with the highest UV index in Charlestown are May through August, with an average maximum UV index of 6.

What is the UV index reading in June in Charlestown?

In June, the average daily maximum UV index in Charlestown is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJuneJASOND
May
June
Jul
Average high temperature
71.6°F 22°C
79.5°F 26.4°C
84.7°F 29.3°C
Average low temperature
54.5°F 12.5°C
62.4°F 16.9°C
67.6°F 19.8°C
Average pressure
30.01" 762mmHg
29.94" 760mmHg
29.96" 761mmHg
Average wind speed
6.9mph 11.1km/h
6.4mph 10.3km/h
5.4mph 8.7km/h
Average max. wind speed
7.5mph 12.1km/h
7mph 11.3km/h
5.8mph 9.3km/h
Average wind speed gusts
10.8mph 17.4km/h
10.2mph 16.4km/h
8.6mph 13.8km/h
Average humidity
79%
79%
77%
Average rainfall
2.68" 68mm
2.6" 66mm
3.43" 87mm
Average rainfall days
17.4
15.3
16.4
Average snowfall
0.08" 2mm
0" 0mm
0" 0mm
Average snowfall days
0.1
0
0
Average sea temperature
53.9°F 12.2°C
66.6°F 19.2°C
74.4°F 23.6°C
Average daylight
14h 2min
14h 5min
14h 4min
Average sunshine
8h 4min
10h 1min
10h 4min
Average sunshine days
11.7
11.8
11.6
Average UV index
6
6
6
Average cloud cover
45%
35%
31%
Average visibility
5mi 8km
6mi 9.7km
6mi 9.7km

Average temperature in June
Charlestown, MD

Average temperature in June - Charlestown, MD
  • Average high temperature in June: 79.5°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in June: 62.4°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in June
Charlestown, MD

Average pressure in June - Charlestown, MD
  • Average pressure in June: 29.94"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in June
Charlestown, MD

Average wind speed in June - Charlestown, MD
  • Average wind speed in June: 6.4mph

The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in June
Charlestown, MD

Average humidity in June - Charlestown, MD
  • Average humidity in June: 79%

The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in June
Charlestown, MD

Average rainfall in June - Charlestown, MD
  • Average rainfall in June: 2.6"

The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in June
Charlestown, MD

Average rainfall days in June - Charlestown, MD
  • Average rainfall days in June: 15.3 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in June
Charlestown, MD

Average snowfall in June - Charlestown, MD
  • Average snowfall in June: 0"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, June, July, August, September and October (0").

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Average snowfall days in June
Charlestown, MD

Average snowfall days in June - Charlestown, MD
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).

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Average sea temperature in June
Charlestown, MD

Average sea temperature in June - Charlestown, MD
  • Average sea temperature in June: 66.6°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

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Average daylight in June /
Average sunshine in June
Charlestown, MD

Average daylight in June / Average sunshine in June - Charlestown, MD
  • Average daylight in June: 14h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in June: 10h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in June
Charlestown, MD

Average sunshine days in June - Charlestown, MD
  • Average sunshine days in June: 11.8 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in June
Charlestown, MD

Average UV index in June - Charlestown, MD
  • Average UV index in June: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in June
Charlestown, MD

Average cloud cover in June - Charlestown, MD
  • Average cloud cover in June: 35

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in June
Charlestown, MD

Average visibility in June - Charlestown, MD
  • Average visibility in June: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

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Charlestown, Maryland, USA

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