![]() Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).įor each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. The coldest month of the year in Mira Mesa is December, with an average low of 47☏ and high of 67☏.Īverage High and Low Temperature in Mira Mesa ![]() The cool season lasts for 4.4 months, from November 28 to April 10, with an average daily high temperature below 69☏. The hottest month of the year in Mira Mesa is August, with an average high of 81☏ and low of 65☏. The warm season lasts for 2.8 months, from July 5 to September 28, with an average daily high temperature above 79☏. Click on each chart for more information. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.ComfortablewarmcomfortableJanFebMarAprMayJunJulAugSepOctNovDecNowNow91%91%57%57%clearovercastprecipitation: 2.7 inprecipitation: 2.7 in0.0 in0.0 inmuggy: 10%muggy: 10%0%0%drydrytourism score: 8.6tourism score: 8.63.23.2 On bright days sunglasses that block both UVA and UVB rays should be worn. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Light skin individuals may get burned in less than 30 minutes. Note: The daily maximum UV index of 4 in January interpret into the following advice: A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals. ![]() UV indexThe months with the lowest UV index in Mira Mesa are January through March, November and December, with an average maximum UV index of 4. SunshineJanuary and December, with an average of 6.8h of sunshine, are months with the least sunshine. On the last day of the month, sunrise is at 6:44 am and sunset at 5:19 pm PST. ![]() On the first day of January, sunrise is at 6:51 am and sunset at 4:53 pm. DaylightIn January, the average length of the day is 10h and 16min. In Mira Mesa, California, during the entire year, the rain falls for 41.9 days and collects up to 3.35" (85mm) of precipitation. Throughout January, 0.35" (9mm) of precipitation is accumulated. Rainfall In January, the rain falls for 4 days. HumidityIn Mira Mesa, the average relative humidity in January is 57%. In Mira Mesa, the average low-temperature is 49.8☏ (9.9☌). TemperatureIn January, the average high-temperature is essentially the same as in December - a still enjoyable 65.3☏ (18.5☌). ![]() January, like December, in Mira Mesa, California, is another enjoyable winter month, with an average temperature varying between 65.3☏ (18.5☌) and 49.8☏ (9.9☌). ![]()
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