Keystone, MT 21 December Weather

Altitude - 1141m | 47°16′5″N,114°56′10″W | map (OSM)

Keystone, MT

°F

8:30 pmClear2mphSW

Sat, December 13, 20259:09 PM (GMT -07:00)

Sunday Dec 21 2025	12 am	3 am	6 am	9 am	12 pm	3 pm	6 pm	9 pm

temperature °F	32°	31°	31°	31°	33°	34°	32°	32°
wind	4mph	4mph	3mph	4mph	4mph	4mph	3mph	3mph
pressure in	25.95	25.94	25.95	25.95	25.95	25.92	25.90	25.90

Saturday Dec 21 2024	12 am	3 am	6 am	9 am	12 pm	3 pm	6 pm	9 pm

temperature °F	36°	36°	36°	34°	40°	39°	41°	42°
wind	2mph	1mph	2mph	3mph	3mph	1mph	2mph	3mph
pressure in	26.18	26.16	26.15	26.11	26.08	26.01	26.04	26.11

Thursday Dec 21 2023	12 am	3 am	6 am	9 am	12 pm	3 pm	6 pm	9 pm

temperature °F	38°	38°	37°	36°	42°	45°	41°	38°
wind	2mph	1mph	2mph	1mph	1mph	2mph	2mph	2mph
pressure in	26.14	26.16	26.17	26.19	26.21	26.18	26.17	26.16

* Keystone, MT weather for December 21 is prepared on the basis of GFS data and is intended for personal use in the "as is" (as is) format. You can see on this page Keystone, MT Weather for December 21, as well as compare air temperature with the climate norm for this date. Perhaps you will be interested - for comparison, the actual weather on December 21 for previous years is presented.