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Monthly climate in Helena, Alabama, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Helena features a humid subtropical climate (Cfa).Temperatures typically range between 8 °C (47 °F) and 27 °C (81 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1481 mm (58.3 inches) and receives 134 rainy days on the 1 mm (0.04 inches) threshold annually.Helena enjoys an average of 3077 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Helena, Alabama, United States §

The warmest months in Helena 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 (47 - 53 °F) throughout the day. On average each year, Helena experiences 158 days above 25 °C (77.0 °F) and 24 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Helena, 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
(80°F)		 27°C
(81°F)		 30°C
(87°F)		 32°C
(89°F)		 34°C
(94°F)		 34°C
(94°F)		 35°C
(96°F)		 37°C
(99°F)		 36°C
(98°F)		 36°C
(98°F)		 27°C
(81°F)		 25°C
(76°F)
Mean maximum 23°C
(74°F)		 25°C
(78°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
(78°F)		 23°C
(74°F)
Average high 13°C
(57°F)		 17°C
(63°F)		 20°C
(69°F)		 24°C
(75°F)		 28°C
(82°F)		 30°C
(87°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(87°F)		 25°C
(78°F)		 18°C
(65°F)		 15°C
(59°F)
Daily mean 8°C
(47°F)		 11°C
(53°F)		 15°C
(59°F)		 17°C
(64°F)		 22°C
(73°F)		 25°C
(78°F)		 27°C
(81°F)		 26°C
(80°F)		 25°C
(77°F)		 20°C
(68°F)		 12°C
(54°F)		 10°C
(50°F)
Average low 3°C
(38°F)		 6°C
(43°F)		 9°C
(49°F)		 11°C
(53°F)		 17°C
(63°F)		 21°C
(70°F)		 23°C
(73°F)		 22°C
(73°F)		 20°C
(68°F)		 15°C
(59°F)		 6°C
(43°F)		 5°C
(41°F)
Mean minimum -6°C
(21°F)		 -4°C
(26°F)		 -2°C
(29°F)		 2°C
(36°F)		 9°C
(48°F)		 16°C
(62°F)		 20°C
(68°F)		 18°C
(66°F)		 14°C
(57°F)		 5°C
(40°F)		 -3°C
(27°F)		 -4°C
(25°F)
Minimum -12°C
(11°F)		 -7°C
(20°F)		 -4°C
(25°F)		 1°C
(34°F)		 6°C
(42°F)		 14°C
(57°F)		 17°C
(64°F)		 17°C
(62°F)		 11°C
(51°F)		 0°C
(33°F)		 -6°C
(22°F)		 -6°C
(21°F)

Compare climate in Helena with other places

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

Monthly average precipitation in Helena, Alabama, United States §

Helena usually has the most precipitation in February, June and December, with an average of 13 rainy days and 148 mm (5.8 inches) of precipitation per month.The driest months in Helena 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 Helena, 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) 112 (4.4) 155 (6.1) 134 (5.3) 140 (5.5) 108 (4.2) 147 (5.8) 122 (4.8) 122 (4.8) 85 (3.3) 132 (5.2) 83 (3.3) 142 (5.6)
Average precipitation days (≥ 1 mm) 9 13 12 8 10 15 17 14 8 8 8 12

Monthly sunshine hours in Helena, Alabama, United States §

The sunniest months in Helena are May, July and August, when the sun shines an average of 10 hours 15 minutes a day.Least sunny months in Helena: January, February and December receive an average of 5 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Helena, 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 162 167 233 280 310 298 333 310 286 266 244 183
Mean daily daylight hours 10h 13m 10h 59m 11h 59m 13h 1m 13h 53m 14h 18m 14h 4m 13h 18m 12h 19m 11h 18m 10h 25m 9h 58m

Solar UV radiation in Helena, Alabama, United States §

Helena 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 Helena UV Index data.

Average daily maximum UV levels by month for Helena, 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 8 6 4