Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Boulder City features a hot desert climate (BWh). Temperatures typically range between 10 °C (50 °F) and 35 °C (96 °F) through the year, but rarely can drop to -3 °C (28 °F) or can rise to as high as 47 °C (116 °F). The average annual precipitation amounts to about 149 mm (5.9 inches) and receives 24 rainy days on the 1 mm (0.04 inches) threshold annually. Boulder City enjoys an average of 3647 hours of sunshine throughout the year, and daylight varies from 9 hours 44 minutes to 14 hours 32 minutes per day.
The warmest months in Boulder City are June, July and August, with daily mean temperatures ranging from 33 to 35 °C (91 - 96 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 12 °C (50 - 53 °F) throughout the day. On average each year, Boulder City experiences 181 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 21°C (70°F) |
25°C (77°F) |
33°C (92°F) |
37°C (100°F) |
42°C (108°F) |
47°C (116°F) |
47°C (116°F) |
45°C (114°F) |
45°C (114°F) |
38°C (101°F) |
30°C (86°F) |
24°C (75°F) |
| Mean maximum | 19°C (67°F) |
24°C (75°F) |
29°C (85°F) |
35°C (95°F) |
38°C (102°F) |
42°C (108°F) |
45°C (114°F) |
44°C (112°F) |
43°C (110°F) |
35°C (95°F) |
27°C (81°F) |
20°C (69°F) |
| Average high | 14°C (58°F) |
17°C (63°F) |
22°C (71°F) |
28°C (82°F) |
32°C (89°F) |
39°C (102°F) |
41°C (106°F) |
41°C (105°F) |
36°C (97°F) |
27°C (82°F) |
21°C (70°F) |
14°C (58°F) |
| Daily mean | 10°C (50°F) |
12°C (53°F) |
16°C (61°F) |
22°C (71°F) |
26°C (78°F) |
33°C (91°F) |
35°C (96°F) |
35°C (95°F) |
30°C (86°F) |
21°C (71°F) |
15°C (60°F) |
10°C (50°F) |
| Average low | 5°C (42°F) |
7°C (44°F) |
11°C (51°F) |
15°C (60°F) |
19°C (67°F) |
26°C (79°F) |
29°C (85°F) |
28°C (83°F) |
24°C (75°F) |
15°C (60°F) |
10°C (50°F) |
5°C (42°F) |
| Mean minimum | 0°C (33°F) |
0°C (33°F) |
5°C (41°F) |
9°C (49°F) |
12°C (54°F) |
19°C (66°F) |
24°C (75°F) |
24°C (75°F) |
17°C (63°F) |
8°C (47°F) |
4°C (39°F) |
1°C (34°F) |
| Minimum | -3°C (28°F) |
-1°C (30°F) |
4°C (39°F) |
8°C (46°F) |
11°C (52°F) |
16°C (61°F) |
23°C (74°F) |
23°C (75°F) |
13°C (55°F) |
2°C (36°F) |
2°C (35°F) |
0°C (33°F) |
Compare temperature, precipitation, sunshine, UV index in Boulder City, Nevada, United States with other places around the world.
Boulder City usually has the most precipitation in January, February and March, with an average of 3 rainy days and 21 mm (0.8 inches) of precipitation per month. The driest months in Boulder City are April, June and September. On average, 3 mm (0.1 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 21 (0.8) | 21 (0.8) | 20 (0.8) | 5 (0.2) | 6 (0.2) | 1 (0.0) | 17 (0.7) | 11 (0.4) | 5 (0.2) | 8 (0.3) | 19 (0.7) | 15 (0.6) |
| Average precipitation days (≥ 1 mm) | 3 | 3 | 4 | 1 | 1 | 0 | 4 | 3 | 1 | 1 | 1 | 2 |
The sunniest months in Boulder City are May, June and July, when the sun shines an average of 12 hours 16 minutes a day. Least sunny months in Boulder City: January, February and December receive an average of 7 hours 15 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 187 | 240 | 293 | 326 | 370 | 380 | 378 | 362 | 322 | 294 | 258 | 232 |
| Mean daily daylight hours | 10h 1m | 10h 53m | 11h 59m | 13h 7m | 14h 4m | 14h 32m | 14h 17m | 13h 26m | 12h 21m | 11h 13m | 10h 14m | 9h 44m |
Boulder City experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 11 - 12, 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 5. For more detailed information, check out our hourly Boulder City UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 6 | 8 | 10 | 11 | 12 | 12 | 11 | 10 | 7 | 5 | 3 |
Discover in-depth weather details for every month in Boulder City. 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 Boulder City'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.