July weather forecast
Castine, ME

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Weather in July

July in Castine, Maine, is a moderately hot summer month, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 73.9°F (23.3°C).

Temperature

Castine witnesses its peak temperatures during July and August, when the average high-temperature reaches 73.9°F (23.3°C).

Humidity

The months with the highest humidity are February and July, with an average relative humidity of 83%.

Rainfall

July and September are months with the least rain when the rain falls for 14.5 days and typically aggregates up to 1.46" (37mm) of rain.

Snowfall

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

Ocean temperature

In Castine, in July, the average water temperature is 56.8°F (13.8°C).
Note: Staying in 56.8°F (13.8°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.

Daylight

The average length of the day in July is 15h and 8min.
On the first day of July, sunrise is at 4:55 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:01 pm EDT.

Sunshine

The average sunshine in July is 9.4h.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In July, a regular UV index of 5 translates into these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Frequently asked questions

What is the hottest time of year?

Castine's warmest months, July and August, record an average high-temperature of 73.9°F (23.3°C).

What is the temperature in July in Castine?

The average high-temperature, in July, in Castine, is 73.9°F (23.3°C), while the average low-temperature is 57.7°F (14.3°C).

What is the most humid month?

February and July, with an average relative humidity of 83%, are most humid months in Castine.

What is the average humidity in July in Castine?

The average relative humidity in July is 83%.

What is the driest month?

The months with the least rainfall are July and September Rain falls for 14.5 days and accumulates 1.46" (37mm) of rain.

How many days does it rain in July?

In Castine, during July, the rain falls for 14.5 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow?

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

How cold is the water in July?

In Castine, in July, the average water temperature is 56.8°F (13.8°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in July?

In July, the average day length is 15h and 8min.

When are sunrise and sunset in July?

In July, on the first day of the month, sunrise is at 4:55 am and sunset at 8:23 pm. On the last day of the month, in Castine, sunrise is at 5:22 am and sunset at 8:01 pm EDT.

How long on average sun shines in July?

In July, the average sunshine duration is 9.4h.

What is the month with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 5.

What is the UV index reading in July?

In Castine, the average daily maximum UV index in July is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
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 July
Castine, ME

Average temperature in July - Castine, ME
  • Average high temperature in July: 73.9°F

The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in July: 57.7°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in July
Castine, ME

Average pressure in July - Castine, ME
  • Average pressure in July: 29.93"Hg

The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in July
Castine, ME

Average wind speed in July - Castine, ME
  • Average wind speed in July: 6mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in July
Castine, ME

Average humidity in July - Castine, ME
  • Average humidity in July: 83%

The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).

Average rainfall in July
Castine, ME

Average rainfall in July - Castine, ME
  • Average rainfall in July: 1.46"

The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").

Average rainfall days in July
Castine, ME

Average rainfall days in July - Castine, ME
  • Average rainfall days in July: 14.5 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).

Average snowfall in July
Castine, ME

Average snowfall in July - Castine, ME
  • Average snowfall in July: 0"

The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in July
Castine, ME

Average snowfall days in July - Castine, ME
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in July
Castine, ME

Average sea temperature in July - Castine, ME
  • Average sea temperature in July: 56.7°F

The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).

Average daylight in July /
Average sunshine in July
Castine, ME

Average daylight in July / Average sunshine in July - Castine, ME
  • Average daylight in July: 15h and 1min

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 July: 9h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in July
Castine, ME

Average sunshine days in July - Castine, ME
  • Average sunshine days in July: 14.7 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).

Average UV index in July
Castine, ME

Average UV index in July - Castine, ME
  • Average UV index in July: 5

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in July
Castine, ME

Average cloud cover in July - Castine, ME
  • Average cloud cover in July: 41

The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).

Average visibility in July
Castine, ME

Average visibility in July - Castine, ME
  • Average visibility in July: 5mi

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

Castine, Maine, USA

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