Weather in Sweet Grass County

Calculated from weather data of Big Timber At Howard Field (K6S0) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	39.0	34.0	37.0	41.0	39.0	40.0
February	35.0	43.0	40.0	38.0	24.0	43.0
March	43.0	45.0	34.0	50.0	51.0	44.0
April	53.0		55.0	47.0	55.0	55.0
May	63.0		69.0	61.0	62.0	63.0
June	74.0		69.0	74.0	83.0	75.0
July	85.0		83.0	87.0	92.0	83.0
August	84.0		81.0	89.0	82.0	87.0
September	75.0		74.0	79.0	78.0	77.0
October	56.0		55.0	62.0	60.0	55.0
November	47.0		51.0	39.0	54.0	49.0
December	41.0		46.0	35.0	39.0	43.0
Average	53.0	41.0	58.0	59.0	60.0	60.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	23.0	17	23	23	27	26
February	17.0	27	20	18	11	23
March	25.0	27	20	29	29	26
April	32.0		33	26	32	31
May	41.0		46	40	39	42
June	51.0		51	48	54	50
July	57.0		55	57	60	55
August	56.0		58	59	56	55
September	49.0		49	50	49	48
October	37.0		37	42	40	35
November	30.0		34	23	35	32
December	25.0		31	16	21	29
Average	33.0	24.0	38.0	37.0	38.0	38.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	14	47	51	34
77 °F or warmer	0	61	88	100	90
68 °F or warmer	1	126	129	136	138
32 °F or colder	58	118	120	115	115

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	0.0	0	0	0	0	0
February	0.0	0	0	0	0	0
March	0.0	0	0	0	0	0
April	0.0		0	0	0	0
May	0.0		0	0	0	0
June	0.0		0	0	0	0
July	0.0		0	0	0	0
August	0.0		0	0	0	0
September	0.0		0	0	0	0
October	0.0		0	0	0	0
November	0.0		0	0	0	0
December	0.0		0	0	0	0
Average

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	20.5	15	21	24	21	21
February	18.5	18	22	23	17	21
March	14.1	13	11	19	16	15
April	14.3		14	15	14	16
May	12.0		10	15	12	13
June	11.8		8	13	11	14
July	10.6		10	10	10	12
August	11.1		11	11	12	11
September	12.4		9	11	14	15
October	15.4		12	16	13	17
November	20.3		20	20	22	21
December	19.9		19	16	17	24
Average	15.6	15.0	13.2	15.7	14.5	15.9

14th highest wind speed of United States

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	W	W	W	W	W
February	W	W	W	W	W
March	W	W	W	W	W
April		W	W	W	W
May		W	W	W	W
June		W	W	W	W
July		W	W	W	W
August		W	W	W	W
September		W	W	W	W
October		W	W	W	W
November		W	W	W	W
December		W	W	W	W

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Sweet Grass County weather Q&A

What is the warmest month in Sweet Grass County?

The warmest month is July with an average temperature of 85 °F over the past years.

What is the coldest month in Sweet Grass County?

The coldest month is February with an average daytime temperature of 35 °F in the past few years.

Which month is the wettest in Sweet Grass County?

Chance of precipitation is the highest in January with a probability of around 0.0 %.

Which month is the driest in Sweet Grass County?

The least rainfall and snow can be expected in January. The probability is about 0.0 %.