Winthrop
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Winthrop, MA

July, like June, in Winthrop, Massachusetts, is another warm summer month, with average temperature varying between 64.9°F (18.3°C) and 81.7°F (27.6°C).

Temperature

July is the warmest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C).

Heat index

The average heat index is estimated at a hot 86.5°F (30.3°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like pregnancy, metabolic differences, wind, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In July, the average relative humidity is 73%.

Rainfall

In July, the rain falls for 14.7 days. Throughout July, 1.89" (48mm) of precipitation is accumulated. In Winthrop, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.

Snowfall

In Winthrop snow does not fall in June through September.

Ocean temperature

In Winthrop, the average seawater temperature is 65.8°F (18.8°C).
Note: For most, swimming in 65.8°F (18.8°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).

Daylight

The average length of the day in July is 14.9h.

Sunshine

In July, the average sunshine is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Winthrop. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the warmest month in Winthrop?

The warmest month is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.9°F (18.3°C).

What is the temperature in July in Winthrop?

In July, the average high-temperature is 81.7°F (27.6°C), and the average low-temperature is 64.9°F (18.3°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that represents influence of the relative humidity to air temperaure, is appraised at 86.5°F (30.3°C).

What is the average humidity in July in Winthrop?

The average relative humidity in July is 73%.

How many days does it rain in July in Winthrop?

In July, in Winthrop, the rain falls for 14.7 days. Throughout July, 1.89" (48mm) of precipitation is accumulated.

When it does not snow in Winthrop?

June through September are months without snowfall.

What is the ocean temperature in July in Winthrop?

In Winthrop, the average seawater temperature in July is 65.8°F (18.8°C). For swimming, a surface water temperature of 65.8°F (18.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in July in Winthrop?

In Winthrop, the average length of the day in July is 14.9h.

How many hours of sunshine does Winthrop have in July?

In July, the average sunshine is 10.1h.

What are the months with the highest UV index in Winthrop?

Months with the highest UV index in Winthrop, Massachusetts, are June through August, with an average maximum UV index of 6.

How high is the UV index in July in Winthrop?

The average daily maximum UV index in July in Winthrop, Massachusetts, is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in July - Winthrop, MA
  • Average high temperature in July: 81.7°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).

  • Average low temperature in July: 64.9°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average humidity in July - Winthrop, MA
  • Average humidity in July: 73%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).

Average rainfall in July - Winthrop, MA
  • Average rainfall in July: 1.89"

The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").

Average rainfall days in July - Winthrop, MA
  • Average rainfall days in July: 14.7 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in July - Winthrop, MA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (4.72").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in July - Winthrop, MA
  • Average snowfall days in July: 0 days

Months with the highest number of snowfall days are January and February (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in July - Winthrop, MA
  • Average sea temperature in July: 65.9°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).

Average daylight in July / Average sunshine in July - Winthrop, MA
  • Average daylight in July: 14.9h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in July: 10.1h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average UV index in July - Winthrop, MA
  • Average UV index in July: 6

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