Monthly climate in Middletown, California, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Middletown features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 9 °C (48 °F) and 26 °C (79 °F) through the year, but rarely can drop to -2 °C (28 °F) or can rise to as high as 43 °C (110 °F). The average annual precipitation amounts to about 600 mm (23.6 inches) and receives 48 rainy days on the 1 mm (0.04 inches) threshold annually. Middletown enjoys an average of 3360 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 49 minutes per day.

Monthly average temperatures in Middletown, California, United States §

The warmest months in Middletown are June, July and August, with daily mean temperatures ranging from 24 to 26 °C (75 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 10 °C (48 - 51 °F) throughout the day. On average each year, Middletown experiences 144 days above 25 °C (77.0 °F) and 4 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Middletown, 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 25°C
(77°F)
27°C
(80°F)
29°C
(84°F)
33°C
(91°F)
37°C
(98°F)
42°C
(107°F)
42°C
(107°F)
41°C
(107°F)
43°C
(110°F)
37°C
(99°F)
29°C
(84°F)
24°C
(75°F)
Mean maximum 20°C
(69°F)
23°C
(74°F)
26°C
(79°F)
30°C
(86°F)
34°C
(94°F)
38°C
(100°F)
40°C
(104°F)
40°C
(104°F)
39°C
(103°F)
32°C
(91°F)
26°C
(78°F)
20°C
(68°F)
Average high 14°C
(57°F)
16°C
(62°F)
17°C
(63°F)
22°C
(71°F)
26°C
(78°F)
31°C
(88°F)
34°C
(94°F)
33°C
(93°F)
31°C
(88°F)
26°C
(78°F)
19°C
(66°F)
14°C
(57°F)
Daily mean 9°C
(49°F)
10°C
(51°F)
11°C
(53°F)
15°C
(59°F)
19°C
(66°F)
24°C
(75°F)
26°C
(79°F)
25°C
(78°F)
23°C
(73°F)
18°C
(65°F)
12°C
(55°F)
9°C
(48°F)
Average low 5°C
(42°F)
5°C
(42°F)
6°C
(43°F)
9°C
(49°F)
12°C
(54°F)
16°C
(62°F)
18°C
(65°F)
18°C
(65°F)
16°C
(61°F)
11°C
(53°F)
7°C
(46°F)
5°C
(41°F)
Mean minimum -0°C
(32°F)
-0°C
(32°F)
1°C
(34°F)
4°C
(39°F)
7°C
(45°F)
11°C
(52°F)
15°C
(59°F)
14°C
(58°F)
10°C
(51°F)
6°C
(44°F)
2°C
(35°F)
1°C
(34°F)
Minimum -2°C
(30°F)
-2°C
(28°F)
-1°C
(31°F)
2°C
(36°F)
3°C
(39°F)
9°C
(49°F)
13°C
(56°F)
12°C
(54°F)
7°C
(45°F)
5°C
(41°F)
-1°C
(31°F)
-1°C
(31°F)

Compare climate in Middletown with other places

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

Monthly average precipitation in Middletown, California, United States §

Middletown usually has the most precipitation in January, February and December, with an average of 7 rainy days and 121 mm (4.8 inches) of precipitation per month. The driest months in Middletown are July, August and September. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Middletown, 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) 132 (5.2) 140 (5.5) 90 (3.5) 36 (1.4) 24 (0.9) 3 (0.1) 0 (0.0) 1 (0.0) 2 (0.1) 36 (1.4) 46 (1.8) 91 (3.6)
Average precipitation days (≥ 1 mm) 8 7 11 5 3 0 0 0 0 2 5 7

Monthly sunshine hours in Middletown, California, United States §

The sunniest months in Middletown are June, July and August, when the sun shines an average of 12 hours 24 minutes a day. Least sunny months in Middletown: January, February and December receive an average of 5 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Middletown, 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 135 202 244 292 356 386 398 356 316 278 213 179
Mean daily daylight hours 9h 47m 10h 45m 11h 59m 13h 14m 14h 18m 14h 49m 14h 31m 13h 35m 12h 22m 11h 7m 10h 2m 9h 29m

Solar UV radiation in Middletown, California, United States §

Middletown 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, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Middletown UV Index data.

Average daily maximum UV levels by month for Middletown, 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 7 9 11 11 11 10 9 7 4 3

Detailed Monthly Weather Insights for Middletown, California, United States

Discover in-depth weather details for every month in Middletown. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Middletown's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.