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Monthly climate in Mountain Brook, Alabama, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mountain Brook features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (46 °F) and 27 °C (81 °F) through the year, but rarely can drop to -12 °C (10 °F) or can rise to as high as 37 °C (100 °F).The average annual precipitation amounts to about 1514 mm (59.6 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually.Mountain Brook enjoys an average of 3085 hours of sunshine throughout the year, and daylight varies from 9 hours 56 minutes to 14 hours 20 minutes per day.

Monthly average temperatures in Mountain Brook, Alabama, United States §

The warmest months in Mountain Brook are June, July and August, with daily mean temperatures ranging from 25 to 27 °C (78 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 11 °C (46 - 52 °F) throughout the day. On average each year, Mountain Brook experiences 155 days above 25 °C (77.0 °F) and 27 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mountain Brook, Alabama, 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 26°C
(79°F)		 27°C
(81°F)		 30°C
(87°F)		 31°C
(89°F)		 34°C
(93°F)		 34°C
(94°F)		 36°C
(97°F)		 37°C
(100°F)		 37°C
(99°F)		 37°C
(98°F)		 27°C
(81°F)		 24°C
(76°F)
Mean maximum 23°C
(74°F)		 25°C
(77°F)		 28°C
(82°F)		 29°C
(84°F)		 33°C
(91°F)		 33°C
(92°F)		 35°C
(95°F)		 35°C
(95°F)		 34°C
(93°F)		 32°C
(90°F)		 25°C
(77°F)		 23°C
(73°F)
Average high 13°C
(56°F)		 17°C
(62°F)		 20°C
(68°F)		 23°C
(74°F)		 28°C
(82°F)		 30°C
(86°F)		 32°C
(90°F)		 32°C
(89°F)		 30°C
(87°F)		 25°C
(77°F)		 18°C
(64°F)		 15°C
(59°F)
Daily mean 8°C
(46°F)		 11°C
(52°F)		 14°C
(58°F)		 17°C
(63°F)		 22°C
(72°F)		 25°C
(78°F)		 27°C
(81°F)		 26°C
(80°F)		 25°C
(77°F)		 19°C
(67°F)		 11°C
(53°F)		 10°C
(49°F)
Average low 3°C
(38°F)		 6°C
(43°F)		 9°C
(48°F)		 11°C
(52°F)		 17°C
(63°F)		 21°C
(70°F)		 23°C
(73°F)		 22°C
(72°F)		 20°C
(68°F)		 15°C
(58°F)		 6°C
(43°F)		 5°C
(41°F)
Mean minimum -7°C
(20°F)		 -4°C
(25°F)		 -2°C
(29°F)		 2°C
(36°F)		 8°C
(47°F)		 16°C
(61°F)		 19°C
(67°F)		 18°C
(65°F)		 14°C
(57°F)		 4°C
(40°F)		 -3°C
(28°F)		 -4°C
(25°F)
Minimum -12°C
(10°F)		 -7°C
(19°F)		 -5°C
(24°F)		 1°C
(33°F)		 4°C
(40°F)		 14°C
(57°F)		 17°C
(63°F)		 16°C
(61°F)		 10°C
(51°F)		 0°C
(32°F)		 -6°C
(21°F)		 -6°C
(22°F)

Compare climate in Mountain Brook with other places

Compare temperature, precipitation, sunshine, UV index in Mountain Brook, Alabama, United States with other places around the world.

Monthly average precipitation in Mountain Brook, Alabama, United States §

Mountain Brook usually has the most precipitation in February, March and December, with an average of 13 rainy days and 154 mm (6.1 inches) of precipitation per month.The driest months in Mountain Brook are May, September and November. On average, 92 mm (3.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mountain Brook, Alabama, 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) 117 (4.6) 168 (6.6) 149 (5.9) 143 (5.6) 105 (4.2) 146 (5.7) 114 (4.5) 125 (4.9) 87 (3.4) 131 (5.2) 82 (3.2) 146 (5.8)
Average precipitation days (≥ 1 mm) 9 14 13 9 11 15 17 15 8 9 8 13

Monthly sunshine hours in Mountain Brook, Alabama, United States §

The sunniest months in Mountain Brook are May, July and August, when the sun shines an average of 10 hours 16 minutes a day.Least sunny months in Mountain Brook: January, February and December receive an average of 5 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mountain Brook, Alabama, 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 161 168 232 280 311 305 332 311 286 268 243 182
Mean daily daylight hours 10h 11m 10h 58m 11h 59m 13h 2m 13h 54m 14h 20m 14h 6m 13h 19m 12h 19m 11h 17m 10h 23m 9h 56m

Solar UV radiation in Mountain Brook, Alabama, United States §

Mountain Brook experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Mountain Brook UV Index data.

Average daily maximum UV levels by month for Mountain Brook, Alabama, 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) 4 7 8 10 11 11 11 11 9 7 6 4