Grass Valley
California, USA
Long-term weather forecast
Long-term weather forecast

June weather forecast and climate
Grass Valley, CA

June, the first month of the summer, in Grass Valley, is a moderately hot month, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 55.9°F (13.3°C).

Temperature

In Grass Valley, the average high-temperature rises, from a pleasant 71.2°F (21.8°C) in May, to a warm 82°F (27.8°C). The average low-temperature, in Grass Valley, California, is 55.9°F (13.3°C).

Heat index

The average heat index in June is appraised at 82.2°F (27.9°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, metabolic differences, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In June, the average relative humidity in Grass Valley is 46%.

Rainfall

In Grass Valley, California, in June, during 2.4 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Grass Valley, California, during the entire year, the rain falls for 82 days and collects up to 33.11" (841mm) of precipitation.

Snowfall

In Grass Valley snow does not fall in June through October.

Daylight

June has the longest days of the year in Grass Valley, with an average of 14.9h of daylight.

Sunshine

The average sunshine in June is 11.8h.

UV index

In June, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in June interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in June in Grass Valley?

In Grass Valley, California, in June, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 55.9°F (13.3°C). In June, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that takes the relative humidity and factores it into the air temperature reading, is evaluated at 82.2°F (27.9°C).

What is the average humidity in June in Grass Valley?

The average relative humidity in June is 46%.

How much does it rain in Grass Valley in June?

In Grass Valley, California, during June, the rain falls for 2.4 days and regularly aggregates up to 0.24" (6mm) of precipitation.

Does it snow in Grass Valley in June?

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

When it does not snow in Grass Valley?

June through October are months without snowfall in Grass Valley.

When are the longest days in Grass Valley?

With an average of 14.9h of daylight, June has the longest days of the year in Grass Valley, California.

How many hours of daylight does Grass Valley have in June?

In Grass Valley, the average length of the day in June is 14.9h.

How long on average sun shines in June in Grass Valley?

In Grass Valley, the average sunshine in June is 11.8h.

What is the UV index reading in June in Grass Valley?

The average daily maximum UV index in June in Grass Valley, California, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in June - Grass Valley, CA
  • Average high temperature in June: 27.8°C

The warmest month (with the highest average high temperature) is July (32.3°C).
The month with the lowest average high temperature is December (10.7°C).

  • Average low temperature in June: 13.3°C

The month with the highest average low temperature is July (15.6°C).
The coldest month (with the lowest average low temperature) is December (2.9°C).

Average humidity in June - Grass Valley, CA
  • Average humidity in June: 46%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).

Average rainfall in June - Grass Valley, CA
  • Average rainfall in June: 6mm

The wettest month (with the highest rainfall) is March (167mm).
Driest months (with the lowest rainfall) are July and August (1mm).

Average rainfall days in June - Grass Valley, CA
  • Average rainfall days in June: 2.4 days

The month with the highest number of rainy days is March (15.1 days).
The month with the lowest number of rainy days is July (1.1 days).

Average snowfall in June - Grass Valley, CA
  • Average snowfall in June: 0mm

The month with the highest snowfall is February (163mm).
Months with the lowest snowfall are June, July, August, September and October (0mm).

Average snowfall days in June - Grass Valley, CA
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is March (2.4 days).
Months with the lowest number of snowfall days are June, July, August, September and October (0 days).

Average daylight in June / Average sunshine in June - Grass Valley, CA
  • Average daylight in June: 14.9h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in June: 11.8h

The month with most sunshine is July (Average sunshine: 12.2h).
The month with least sunshine is January (Average sunshine: 5.7h).

Average UV index in June - Grass Valley, CA
  • Average UV index in June: 6

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).