July weather forecast
Fullerton, CA

July sets the stage as the hottest month in Fullerton with average high temperatures soaring to 81.5°F (27.5°C). But, residents and visitors need not worry about sweltering heat as the city records the lowest relative humidity of 61%. The cooling breeze of 5.1mph (8.2km/h) offers comfort in the warm weather, while the rainfall almost triples from June, recording 0.28" (7mm). The plentiful sunlight allows for long outdoor ventures during July. Nevertheless, pack your sunscreen as the UV index creeps up to 6 this month.

Temperature

Entering July, Fullerton's average high-temperature reads a still warm 81.5°F (27.5°C), indicating a close resemblance to the previous month's climate. Fullerton's nighttime temperature during July is consistently averaged at a refreshing 63.9°F (17.7°C).

Heat index

The heat index value during July is appraised at 84.2°F (29°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.
One should consider that heat index numbers are for shaded settings and light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.

Humidity

In Fullerton, the average relative humidity in July is 61%.

Rainfall

In July, the rain falls for 3.9 days. Throughout July, 0.28" (7mm) of precipitation is accumulated. Throughout the year, in Fullerton, there are 52.5 rainfall days, and 7.09" (180mm) of precipitation is accumulated.

Daylight

In Fullerton, California, the average length of the day in July is 14h and 9min.
On the first day of the month, sunrise is at 5:44 am and sunset at 8:06 pm. On the last day of July, in Fullerton, sunrise is at 6:03 am and sunset at 7:52 pm PDT.

Sunshine

July and August, with an average of 12h of sunshine, are months with the most sunshine in Fullerton, California.

UV index

The months with the highest UV index in Fullerton are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 6 during July translates into the following directions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. 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. Always opt for UVA and UVB-resistant sunglasses on radiant days.