May weather forecast
Fresno, CA

May ushers in the comfortable embrace of a warm early-summer atmosphere. The month is characterized by significant upswing in temperatures, complemented by extended sunshine hours. Rainfall plunges to 0.79 in, marking a move towards drier days ahead. The improved conditions lead to a drop in relative humidity, ensuring warm and uncomplicated weather that makes May the gateway to summer. As evidenced, the weather change in May is quite perceptible, transitioning from the pleasant spring climate to the upcoming summer heat.

Temperature

Fresno's weather in May presents a minor rise in the average high-temperature, moving from an agreeable 72.3°F in April to a moderately hot 81°F. Despite the drastic temperature difference, Fresno records an average nighttime low of 55.9°F throughout May.

Heat index

For most parts of May, the heat index is appraised at 80.6°F. Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

In May, the average relative humidity in Fresno, California, is 44%.

Rainfall

In Fresno, in May, during 4.8 rainfall days, 0.79" of precipitation is typically accumulated. In Fresno, during the entire year, the rain falls for 59.3 days and collects up to 10.43" of precipitation.

Daylight

In Fresno, the average length of the day in May is 14h and 9min.
On the first day of the month, sunrise is at 6:04 am and sunset at 7:47 pm. On the last day of May, in Fresno, California, sunrise is at 5:41 am and sunset at 8:11 pm PDT.

Sunshine

In May, the average sunshine in Fresno, California, is 11.6h.

UV index

In May, the average daily maximum UV index in Fresno, California, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in May interprets into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.