August weather forecast
McHenry, CA

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Weather in August

August, the last month of the summer in McHenry, is also a fiery hot month, with an average temperature varying between 95.5°F (35.3°C) and 61.3°F (16.3°C).

Temperature

The transition into August shows a subtle variation to a still torrid 95.5°F (35.3°C) from July's 96.4°F (35.8°C) in the average high-temperature. Throughout August, McHenry braces for a considerable drop from daytime highs, with an average low-temperature of 61.3°F (16.3°C).

Heat index

The heat index in August is evaluated at a very hot 100.4°F (38°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In McHenry, the average relative humidity in August is 40%.

Rainfall

July and August are months with the least rain when the rain falls for 0.7 days and typically aggregates up to 0.04" (1mm) of rain.

Snowfall

January through November are months without snowfall in McHenry.

Daylight

The average length of the day in August is 13h and 34min.
On the first day of August, sunrise is at 6:08 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:34 pm PDT.

Sunshine

The average sunshine in August in McHenry is 12h.

UV index

In McHenry, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
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Frequently asked questions

How hot is it in McHenry in August?

In August, the average high-temperature and low-temperature in McHenry are 95.5°F (35.3°C) and 61.3°F (16.3°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 100.4°F (38°C).

What is the average humidity in August in McHenry?

In McHenry, the average relative humidity in August is 40%.

What is the driest month in McHenry?

July and August are months with the least rain when the rain falls for 0.7 days and typically aggregates up to 0.04" (1mm) of rain.

How much does it rain in McHenry in August?

In McHenry, in August, during 0.7 rainfall days, 0.04" (1mm) of precipitation is typically accumulated.

When it does not snow in McHenry?

January through November are months without snowfall in McHenry, California.

How many hours of daylight does McHenry have in August?

In McHenry, California, the average day length in August is 13h and 34min.

When is the sunrise / sunset in August in McHenry?

On the first day of August in McHenry, California, sunrise is at 6:08 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:34 pm PDT.

How long on average sun shines in August in McHenry?

In August, the average sunshine duration in McHenry, California, is 12h.

What is the UV index reading in August in McHenry?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.
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 August
McHenry, CA

Average temperature in August - McHenry, CA
  • Average high temperature in August: 95.5°F

The warmest month (with the highest average high temperature) is July (96.4°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in August: 61.3°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (41°F).

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Average pressure in August
McHenry, CA

Average pressure in August - McHenry, CA
  • Average pressure in August: 29.92"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in August
McHenry, CA

Average wind speed in August - McHenry, CA
  • Average wind speed in August: 6.4mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average humidity in August
McHenry, CA

Average humidity in August - McHenry, CA
  • Average humidity in August: 40%

The month with the highest relative humidity is January (72%).
The month with the lowest relative humidity is July (37%).

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Average rainfall in August
McHenry, CA

Average rainfall in August - McHenry, CA
  • Average rainfall in August: 0.04"

The wettest month (with the highest rainfall) is March (1.65").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in August
McHenry, CA

Average rainfall days in August - McHenry, CA
  • Average rainfall days in August: 0.7 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is August (0.7 days).

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Average snowfall in August
McHenry, CA

Average snowfall in August - McHenry, CA
  • Average snowfall in August: 0"

The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
McHenry, CA

Average snowfall days in August - McHenry, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in August /
Average sunshine in August
McHenry, CA

Average daylight in August / Average sunshine in August - McHenry, CA
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in August
McHenry, CA

Average sunshine days in August - McHenry, CA
  • Average sunshine days in August: 29.2 days

The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is March (18.7 days).

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Average UV index in August
McHenry, CA

Average UV index in August - McHenry, CA
  • Average UV index in August: 6

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in August
McHenry, CA

Average cloud cover in August - McHenry, CA
  • Average cloud cover in August: 5

The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in August
McHenry, CA

Average visibility in August - McHenry, CA
  • Average visibility in August: 6mi

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

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McHenry, California, USA

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