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What is Big Arm, MT, Weather Like in October?
During the month of October, Big Arm, MT,
has an average daytime high temperature of 55°F and an average overnight low temperature dropping to 34°F.
Around 1.49 inches of precipitation is received during the month,
with about 13.32 inches falling in a typical year.
0.70 inches of snow is the mean amount received during October.
Annually, Big Arm receives around 19.20 inches of snow.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 22, 2025)
Actual High
Average High
Actual Low
Average Low
Month Summary
Average High: 56.4 F
(-1.5 vs avg)
Average Low: 37.6 F
(+2.3 vs avg)
Actual data from: MID_E6663
Big Arm, MT Daily Weather Averages for October
Recorded at Skq Dam
(usc00246640),
8.7 miles
SSE of
Big Arm, MT
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 39 F | 64 F | 51 F | 0.04" | 11.87" | 0.00" | 18.50" | 13.7 F | N/A |
| 10/2 | 38 F | 63 F | 51 F | 0.09" | 11.92" | 0.00" | 18.50" | 14.2 F | N/A |
| 10/3 | 38 F | 63 F | 50 F | 0.13" | 11.96" | 0.00" | 18.50" | 14.6 F | N/A |
| 10/4 | 38 F | 62 F | 50 F | 0.17" | 12.00" | 0.00" | 18.50" | 15.1 F | N/A |
| 10/5 | 37 F | 62 F | 50 F | 0.21" | 12.04" | 0.00" | 18.50" | 15.5 F | N/A |
| 10/6 | 37 F | 61 F | 49 F | 0.25" | 12.08" | 0.00" | 18.50" | 16 F | N/A |
| 10/7 | 37 F | 60 F | 49 F | 0.29" | 12.12" | 0.00" | 18.50" | 16.5 F | N/A |
| 10/8 | 36 F | 60 F | 48 F | 0.33" | 12.16" | 0.00" | 18.50" | 17 F | N/A |
| 10/9 | 36 F | 59 F | 48 F | 0.38" | 12.21" | 0.00" | 18.50" | 17.4 F | N/A |
| 10/10 | 36 F | 59 F | 47 F | 0.42" | 12.25" | 0.10" | 18.60" | 17.9 F | N/A |
| 10/11 | 35 F | 58 F | 47 F | 0.47" | 12.30" | 0.10" | 18.60" | 18.4 F | N/A |
| 10/12 | 35 F | 57 F | 46 F | 0.51" | 12.34" | 0.10" | 18.60" | 18.9 F | N/A |
| 10/13 | 35 F | 57 F | 46 F | 0.56" | 12.39" | 0.10" | 18.60" | 19.4 F | N/A |
| 10/14 | 34 F | 56 F | 45 F | 0.61" | 12.44" | 0.10" | 18.60" | 19.9 F | N/A |
| 10/15 | 34 F | 55 F | 45 F | 0.66" | 12.49" | 0.10" | 18.60" | 20.3 F | N/A |
| 10/16 | 34 F | 55 F | 44 F | 0.71" | 12.54" | 0.20" | 18.70" | 20.8 F | N/A |
| 10/17 | 33 F | 54 F | 44 F | 0.76" | 12.59" | 0.20" | 18.70" | 21.3 F | N/A |
| 10/18 | 33 F | 54 F | 43 F | 0.81" | 12.64" | 0.20" | 18.70" | 21.8 F | N/A |
| 10/19 | 33 F | 53 F | 43 F | 0.86" | 12.69" | 0.30" | 18.80" | 22.2 F | N/A |
| 10/20 | 32 F | 52 F | 42 F | 0.91" | 12.74" | 0.30" | 18.80" | 22.7 F | N/A |
| 10/21 | 32 F | 52 F | 42 F | 0.96" | 12.79" | 0.30" | 18.80" | 23.1 F | N/A |
| 10/22 | 32 F | 51 F | 41 F | 1.01" | 12.84" | 0.40" | 18.90" | 23.6 F | N/A |
| 10/23 | 31 F | 51 F | 41 F | 1.07" | 12.90" | 0.40" | 18.90" | 24 F | N/A |
| 10/24 | 31 F | 50 F | 41 F | 1.12" | 12.95" | 0.40" | 18.90" | 24.5 F | N/A |
| 10/25 | 31 F | 49 F | 40 F | 1.17" | 13.00" | 0.50" | 19.00" | 24.9 F | N/A |
| 10/26 | 31 F | 49 F | 40 F | 1.23" | 13.06" | 0.50" | 19.00" | 25.3 F | N/A |
| 10/27 | 30 F | 48 F | 39 F | 1.28" | 13.11" | 0.60" | 19.10" | 25.7 F | N/A |
| 10/28 | 30 F | 48 F | 39 F | 1.34" | 13.17" | 0.60" | 19.10" | 26.2 F | N/A |
| 10/29 | 30 F | 47 F | 38 F | 1.39" | 13.22" | 0.60" | 19.10" | 26.5 F | N/A |
| 10/30 | 29 F | 47 F | 38 F | 1.44" | 13.27" | 0.70" | 19.20" | 26.9 F | N/A |
| 10/31 | 29 F | 46 F | 38 F | 1.49" | 13.32" | 0.70" | 19.20" | 27.3 F | N/A |
