May weather forecast and climate
Petrolia, CA

Weather in May

The last month of the spring, May, is an enjoyable month in Petrolia, California, with temperature in the range of an average high of 63°F (17.2°C) and an average low of 44.1°F (6.7°C).

Temperature

In May, the average high-temperature is relatively the same as in April - a comfortable 63°F (17.2°C). In May, the average low-temperature is 44.1°F (6.7°C).

Humidity

In Petrolia, California, the average relative humidity in May is 79%.

Rainfall

In May, in Petrolia, the rain falls for 8.1 days. Throughout May, 1.69" (43mm) of precipitation is accumulated. In Petrolia, during the entire year, the rain falls for 110.9 days and collects up to 28.27" (718mm) of precipitation.

Snowfall

January, March through December are months without snowfall in Petrolia.

Daylight

The average length of the day is 14.4h.

Sunshine

The average sunshine in May is 9.9h.

UV index

In May, the average daily maximum UV index in Petrolia is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
[Resources]

FAQ

What is the temperature in May in Petrolia?

In May, in Petrolia, the average high-temperature is 63°F (17.2°C), and the average low-temperature is 44.1°F (6.7°C).

What is the average humidity in May in Petrolia?

The average relative humidity in May in Petrolia is 79%.

How much does it rain in Petrolia in May?

In Petrolia, California, in May, it is raining for 8.1 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow in Petrolia?

January, March through December are months without snowfall.

What is the average length of the day in May in Petrolia?

In Petrolia, California, the average length of the day in May is 14.4h.

How long on average sun shines in May in Petrolia?

In May, the average sunshine in Petrolia is 9.9h.

What is the UV index reading in May in Petrolia?

The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in May
Petrolia, CA

Average temperature in May - Petrolia, CA
  • Average high temperature in May: 63°F

The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (52.9°F).

  • Average low temperature in May: 44.1°F

The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is February (39.7°F).

[Resources]

Average pressure in May
Petrolia, CA

Average pressure in May - Petrolia, CA
  • Average pressure in May: 30.01"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are August and September (29.96").

[Resources]

Average wind speed in May
Petrolia, CA

Average wind speed in May - Petrolia, CA
  • Average wind speed in May: 7.2mph

The windiest month (with the highest average wind speed) is June (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

[Resources]

Average humidity in May
Petrolia, CA

Average humidity in May - Petrolia, CA
  • Average humidity in May: 79%

The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (73%).

[Resources]

Average rainfall in May
Petrolia, CA

Average rainfall in May - Petrolia, CA
  • Average rainfall in May: 1.69"

The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.08").

[Resources]

Average rainfall days in May
Petrolia, CA

Average rainfall days in May - Petrolia, CA
  • Average rainfall days in May: 8.1 days

The month with the highest number of rainy days is March (17.3 days).
Months with the least rainy days are July and August (1.8 days).

[Resources]

Average snowfall in May
Petrolia, CA

Average snowfall in May - Petrolia, CA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.59").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in May
Petrolia, CA

Average snowfall days in May - Petrolia, CA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

[Resources]

Average daylight in May /
Average sunshine in May
Petrolia, CA

Average daylight in May / Average sunshine in May - Petrolia, CA
  • Average daylight in May: 14.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in May: 9.9h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5h).

[Resources]

Average sunshine days in May
Petrolia, CA

Average sunshine days in May - Petrolia, CA
  • Average sunshine days in May: 21.1 days

The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (11.9 days).

[Resources]

Average UV index in May
Petrolia, CA

Average UV index in May - Petrolia, CA
  • Average UV index in May: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

[Resources]

Average cloud cover in May
Petrolia, CA

Average cloud cover in May - Petrolia, CA
  • Average cloud cover in May: 37

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 16).

[Resources]

Average visibility in May
Petrolia, CA

Average visibility in May - Petrolia, CA
  • Average visibility in May: 5mi

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

[Resources]