August weather forecast
North Cucamonga, CA

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Weather in August

The last month of the summer, August, is also a hot month in North Cucamonga, California, with an average temperature fluctuating between 66.6°F (19.2°C) and 91.8°F (33.2°C).

Temperature

North Cucamonga's August weather reaches an average high of 91.8°F (33.2°C) and an average low of 66.6°F (19.2°C), making it the warmest month.

Heat index

In August, the heat index is evaluated at a tropical 93.2°F (34°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely vital to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

August is the least humid month, with an average relative humidity of 41%.

Rainfall

In North Cucamonga, California, during August, the rain falls for 1.9 days and regularly aggregates up to 0.12" (3mm) of precipitation. In North Cucamonga, during the entire year, the rain falls for 42.3 days and collects up to 4.53" (115mm) of precipitation.

Snowfall

In North Cucamonga, California, snow does not fall in January, March through December.

Daylight

In August, the average length of the day is 13h and 23min.
On the first day of the month, sunrise is at 6:02 am and sunset at 7:51 pm. On the last day of August, sunrise is at 6:23 am and sunset at 7:17 pm PDT.

Sunshine

In August, the average sunshine is 12h.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In August, a daily maximum UV index of 7 leads to the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the hottest?

August stands out as North Cucamonga's warmest month, with temperatures ranging between an average high of 91.8°F (33.2°C) and a low of 66.6°F (19.2°C).

How hot is it in August?

The average high-temperature, in August, in North Cucamonga, is 91.8°F (33.2°C), while the average low-temperature is 66.6°F (19.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 93.2°F (34°C).

What is the least humid month?

The least humid month in North Cucamonga is August, with an average relative humidity of 41%.

What is the average humidity in August?

In North Cucamonga, the average relative humidity in August is 41%.

How much does it rain in August?

In North Cucamonga, in August, during 1.9 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When it does not snow?

In North Cucamonga, snow does not fall in January, March through December.

How many hours of daylight does North Cucamonga have in August?

In August, the average day length is 13h and 23min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:02 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:17 pm PDT.

How long on average sun shines in August?

In North Cucamonga, the average sunshine duration in August is 12h.

When is the highest UV index?

July and August, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index reading in August?

In North Cucamonga, the average daily maximum UV index in August is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
North Cucamonga, CA

Average temperature in August - North Cucamonga, CA
  • Average high temperature in August: 91.8°F

The warmest month (with the highest average high temperature) is August (91.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in August: 66.6°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (45.3°F).

Average pressure in August
North Cucamonga, CA

Average pressure in August - North Cucamonga, CA
  • Average pressure in August: 29.88"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in August
North Cucamonga, CA

Average wind speed in August - North Cucamonga, CA
  • Average wind speed in August: 4.8mph

The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

Average humidity in August
North Cucamonga, CA

Average humidity in August - North Cucamonga, CA
  • Average humidity in August: 41%

The months with the highest relative humidity are February, March and May (53%).
The month with the lowest relative humidity is August (41%).

Average rainfall in August
North Cucamonga, CA

Average rainfall in August - North Cucamonga, CA
  • Average rainfall in August: 0.12"

The wettest month (with the highest rainfall) is February (0.98").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in August
North Cucamonga, CA

Average rainfall days in August - North Cucamonga, CA
  • Average rainfall days in August: 1.9 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.9 days).

Average snowfall days in August
North Cucamonga, CA

Average snowfall days in August - North Cucamonga, CA
  • Average snowfall days in August: 0 days

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

Average daylight in August /
Average sunshine in August
North Cucamonga, CA

Average daylight in August / Average sunshine in August - North Cucamonga, CA
  • Average daylight in August: 13h and 2min

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

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

Average sunshine days in August
North Cucamonga, CA

Average sunshine days in August - North Cucamonga, CA
  • Average sunshine days in August: 26.8 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (22.8 days).

Average UV index in August
North Cucamonga, CA

Average UV index in August - North Cucamonga, CA
  • Average UV index in August: 7

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in August
North Cucamonga, CA

Average cloud cover in August - North Cucamonga, CA
  • Average cloud cover in August: 5

The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in August
North Cucamonga, CA

Average visibility in August - North Cucamonga, 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).

North Cucamonga, California, USA

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