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Monthly climate in Byron, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Byron features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 9 °C (49 °F) and 22 °C (72 °F) through the year, but rarely can drop to -2 °C (29 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 431 mm (17.0 inches) and receives 48 rainy days on the 1 mm (0.04 inches) threshold annually.Byron enjoys an average of 3485 hours of sunshine throughout the year, and daylight varies from 9 hours 35 minutes to 14 hours 42 minutes per day.

Monthly average temperatures in Byron, California, United States §

The warmest months in Byron are July, August and September, with daily mean temperatures ranging from 21 to 22 °C (69 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 11 °C (49 - 51 °F) throughout the day. On average each year, Byron experiences 116 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Byron, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 23°C
(74°F)		 25°C
(76°F)		 27°C
(82°F)		 31°C
(88°F)		 36°C
(96°F)		 38°C
(101°F)		 36°C
(97°F)		 40°C
(103°F)		 40°C
(105°F)		 34°C
(93°F)		 26°C
(79°F)		 21°C
(71°F)
Mean maximum 19°C
(66°F)		 22°C
(71°F)		 25°C
(78°F)		 29°C
(84°F)		 32°C
(90°F)		 35°C
(96°F)		 35°C
(94°F)		 36°C
(98°F)		 36°C
(97°F)		 30°C
(86°F)		 24°C
(75°F)		 19°C
(66°F)
Average high 14°C
(57°F)		 16°C
(61°F)		 18°C
(64°F)		 21°C
(70°F)		 24°C
(75°F)		 28°C
(82°F)		 30°C
(86°F)		 30°C
(85°F)		 28°C
(83°F)		 24°C
(76°F)		 18°C
(65°F)		 14°C
(57°F)
Daily mean 9°C
(49°F)		 11°C
(51°F)		 12°C
(54°F)		 14°C
(58°F)		 17°C
(63°F)		 20°C
(69°F)		 22°C
(72°F)		 22°C
(72°F)		 21°C
(69°F)		 17°C
(63°F)		 13°C
(55°F)		 9°C
(49°F)
Average low 6°C
(43°F)		 6°C
(43°F)		 7°C
(45°F)		 9°C
(48°F)		 11°C
(52°F)		 14°C
(58°F)		 15°C
(60°F)		 16°C
(61°F)		 14°C
(58°F)		 11°C
(52°F)		 8°C
(46°F)		 5°C
(42°F)
Mean minimum -1°C
(31°F)		 -0°C
(32°F)		 1°C
(35°F)		 4°C
(40°F)		 7°C
(45°F)		 10°C
(49°F)		 12°C
(55°F)		 13°C
(55°F)		 9°C
(49°F)		 6°C
(42°F)		 3°C
(37°F)		 0°C
(33°F)
Minimum -2°C
(29°F)		 -2°C
(29°F)		 0°C
(33°F)		 3°C
(37°F)		 5°C
(41°F)		 9°C
(48°F)		 11°C
(53°F)		 12°C
(54°F)		 7°C
(44°F)		 4°C
(39°F)		 1°C
(34°F)		 -2°C
(29°F)

Compare climate in Byron with other places

Compare temperature, precipitation, sunshine, UV index in Byron, California, United States with other places around the world.

Monthly average precipitation in Byron, California, United States §

Byron usually has the most precipitation in January, February and December, with an average of 8 rainy days and 84 mm (3.3 inches) of precipitation per month.The driest months in Byron are June, July and August. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Byron, California, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 93 (3.7) 81 (3.2) 74 (2.9) 28 (1.1) 16 (0.6) 1 (0.0) 0 (0.0) 0 (0.0) 2 (0.1) 22 (0.9) 35 (1.4) 78 (3.1)
Average precipitation days (≥ 1 mm) 8 7 11 5 2 0 0 0 0 1 5 9

Monthly sunshine hours in Byron, California, United States §

The sunniest months in Byron are May, June and July, when the sun shines an average of 12 hours 23 minutes a day.Least sunny months in Byron: January, February and December receive an average of 6 hours 24 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Byron, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 160 221 267 301 366 382 391 357 315 287 232 202
Mean daily daylight hours 9h 53m 10h 48m 11h 59m 13h 11m 14h 12m 14h 42m 14h 26m 13h 31m 12h 22m 11h 9m 10h 7m 9h 35m

Solar UV radiation in Byron, California, United States §

Byron experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Byron UV Index data.

Average daily maximum UV levels by month for Byron, California, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 8 9 11 11 11 10 9 7 5 3