Climate and monthly weather forecastHamilton, MT
Climate and monthly weather forecast
The climate of Hamilton
Hamilton, positioned in Montana, USA, experiences a Humid Continental climate, classified as Dfb per Köppen climate categorization. No season experiences aridity, while summer months bring in warmth. Annually, the meteorological patterns present a diverse array of conditions, from ice-cold winters to pleasant summers. The change in meteorological parameters through each season marks significant variations.Temperature shifts from a chilly 14°F (-10°C) in the winter to a warmer 77°F (25°C) during summer. Correspondingly, humidity ranges from a high of 89% in colder times to a low of 51% during the sunny months. A captivating aspect of Hamilton's weather is the change in rainfall and snowfall. The region reports heavy snowfall, peaking at 13.03" (331mm) in February, alongside rain experiencing its maximum in February at 2.36" (60mm).
An additional intriguing element of the climate in Hamilton is the daylight hours, fluctuating from low values of 8.7 hours during the dark winter days to a peak of 15.7 hours during the vivid summer months. Consequently, the amount of sunshine per day also ranges from a low of 5.4 hours in winter to 11.7 hours on sunny summer days.
The best time to visit Hamilton
Visitors seeking to explore the beauty of Hamilton are advised to plan their trip between May and September. The pleasant conditions typical of these months contribute to an agreeable atmosphere for exploration and sightseeing. From May to September, temperatures rise steadily reaching a high of 77°F (25°C) in July. These months experience the lowest rainfall levels, ranging from 0.79" (20mm) in July to 2.09" (53mm) in June and wind speeds are comparatively gentle, varying from 4.3mph (6.9km/h) to 4.5mph (7.2km/h).Additionally, maximum daylight hours during this period range from 13.6 hours in April to a peak of 15.7 hours in June. Correspondingly, sunshine duration rises to its peak of around 11.7 hours through July and August, allowing visitors ample time to explore Hamilton's top attractions.
The worst time to visit Hamilton
Traveling to Hamilton becomes challenging from November to March when winter veils the town under freezing temperatures and heavy snowfall. During this period, temperatures drop dramatically from a high of 26.8°F (-2.9°C) in December to a disastrous low of 14°F (-10°C) in February. Snowfall increases from 6.18" (157mm) in November reaching a high point of 13.03" (331mm) in February.Moreover, increased cloud cover and reduced daylight hours contribute to the harsh weather. Throughout winter, the daylight barely exceeds 10.4 hours. The duration of sunshine also diminishes significantly during the harshest part of winter, decreasing to its lowest at 5.4 hours in December and January.
Spring weather in Hamilton
Spring in Hamilton, occurring from March to May, presents a surge in temperature from 21°F (-6.1°C) to 33.4°F (0.8°C). Correspondingly, the daylight hours increase noticeably from 12 hours in March to 15 hours in May. Rainfall remains relatively consistent from 2.28" (58mm) to 1.97" (50mm) while the winter snow slowly diminishes from 9.09" (231mm) in March, rounding off to 0.67" (17mm) in May.Summer weather in Hamilton
Hamilton experiences summer from June through August. During this period, temperature levels escalate, with lows of 40.6°F (4.8°C) in June to highs of 46.9°F (8.3°C) in August. Daylight hours are prolonged, peaking at 15.7 hours in June before decreasing minimally to 14.1 hours by August. Rainfall reduces to a low of 0.75" (19mm) in August as cloud cover decreases from 28% to 13%.Autumn weather in Hamilton
In the autumn months of September through November, Hamilton experiences dropping temperatures, from a high of 39.9°F (4.4°C) to a low of 21.9°F (-5.6°C). Daylight hours decline from 12.5 hours in September to 9.4 hours in November. Rainfall increases modestly throughout autumn from 0.98" (25mm) to 1.77" (45mm) in November.Winter weather in Hamilton
Winter in Hamilton, from December to February, is intense with consistent low temperatures ranging from a frigid 16.2°F (-8.8°C) to 14°F (-10°C) in February. Daylight hours are limited, ranging from 9.1 hours to 8.7 hours. Precipitation increases from 1.97" (50mm) in December climbing to 2.36" (60mm) in February. Unsurprisingly, the snowfall soars to a peak of 13.03" (331mm) in February, covering the town in a thick, white mantle.Weather in January
In Hamilton, Montana, January showcases winter with its chilling temperatures and frequent snowfall. Compared to December, January presents a slight decrease in temperatures and a significant hike in snowfall from 10.55" (268mm) to 11.89" (302mm). Weather in January »Weather in February
Transitioning from January, February, although slightly less cold, remains under the grip of winter. This month sees an increase in daylight hours to 10.4 hours; however, the temperatures still remain quite low. Being the last full month of winter, February brings increases in both rainfall and snowfall, reaching 2.36" (60mm) and 13.03" (331mm) respectively, the largest of the year. Weather in February »Weather in March
As February makes way for March, a noticeable ease into warmer temperatures and increased daylight hours signal the arrival of spring. Furthermore, an uptick in both daylight and sunshine hours marks a notable deviation from the winter months. Weather in March »Weather in April
April brings subtler shifts in weather conditions in Hamilton, with a steady increase in temperatures and decreasing snowfall. Signifying the full arrival of spring, the snowfall drops drastically from 9.09" (231mm) in March to 5.67" (144mm) in April. Weather in April »Weather in May
May signals the onset of warmer temperatures, an increase in daylight and sunshine hours, and a further decline in snowfall. Hinting at the arrival of summer, snowfall dwindles from 5.67" (144mm) in April to a bare minimum 0.67" (17mm). Weather in May »Weather in June
June in Hamilton marks the advent of summer and the associated warmer conditions. With the arrival of summer, there is no snowfall during the entire month, reflecting a significant shift from the previous months. June boasts longer daylight hours and rises in temperature. Weather in June »Weather in July
July is traditionally the hottest month in Hamilton, providing the most summer-like conditions. In this peak of summer, July sees maximum temperatures reaching a powerful 77°F (25°C); the hottest in the year. Moreover, it brings a significant drop in both relative humidity and rainfall, making it the driest month of the year. Weather in July »Weather in August
August serves as the bridge between the scorching summer temperatures of July and the more temperate conditions that September promises. Yet, the temperatures remain quite high, echoing July's intensity with only a small decline. Weather in August »Weather in September
September brings forth a refreshing break from the summer heat, signifying the onset of fall in Hamilton. A slight dip in temperatures, coupled with balanced rainfall, starts to paint the scenic fall landscape. Interestingly, after a long summer hiatus, snowfall makes its presence felt again, albeit at a small value of 0.55 inch. Weather in September »Weather in October
With the progression into October, Hamilton witnesses a significant change in weather, indicating a full swing into autumn. A steep decline in temperature from September’s 66.2°F (19°C) to October’s 50°F (10°C) occurs, which is characteristic of the season. Weather in October »Weather in November
November in Hamilton is characterized by a plunge in temperatures, increased snowfall, and decreased daylight hours. A chilling introduction to winter, November sees a significant increase in snowfall, from 1.54" (39mm) in October to 6.18" (157mm). Weather in November »Weather in December
Finally rounding off the year, December in Hamilton is marked by a heavy drop in temperatures, the advent of more snowfall, and a noticeable decrease in daylight hours. The snowfall increases significantly from November's 6.18" (157mm) to December's 10.55" (268mm). Weather in December »Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The most humid month is January, with an average relative humidity of 89%.
In Hamilton, during the entire year, the rain falls for 163.6 days and collects up to 20.83" (529mm) of precipitation.
January through May, September through December are months with snowfall.
In Hamilton, during the entire year, snow falls for 101.1 days and aggregates up to 59.17" (1503mm) of snow.
The months with the least sunshine are January and December, with an average of 5.4h of sunshine.
The months with the most rainfall in Hamilton are February and April, with an average 2.36" (60mm) of precipitation.
The month with the most snowfall is February, when snow falls for 19.3 days and typically aggregates up to 13.03" (331mm) of snow.
February and December, with an average maximum UV index of 1, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
In Hamilton, snow does not fall in June through August.
With an average of 15h and 42min of daylight, June has the longest days of the year.
The warmest temperatures in Hamilton occur during July, when averages reach a peak of 77°F (25°C) and a low of 46.8°F (8.2°C).
July and August, with an average of 11.7h of sunshine, are months with the most sunshine.
July is the month with the highest UV index, with an average maximum UV index of 5.
With an average relative humidity of 50%, August is the least humid month.
The month with the least rainfall in Hamilton is August, when the rain falls for 8.7 days and typically collects 0.75" (19mm) of precipitation.
Hamilton's coldest month, December, generally records average temperatures ranging from a high of 26.8°F (-2.9°C) to a low of 14°F (-10°C).
With an average of 8h and 42min of daylight, December has the shortest days of the year.
Average temperature
Hamilton, MT
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).
The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).
Average pressure
Hamilton, MT
- Average pressure in January:
30.21"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.19"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Hamilton, MT
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.1mph - Average wind speed in March:
5mph - Average wind speed in April:
5mph - Average wind speed in May:
4.5mph - Average wind speed in June:
4.5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.1mph - Average wind speed in September:
4.4mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity
Hamilton, MT
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).
Average rainfall
Hamilton, MT
- Average rainfall in January:
2.05" - Average rainfall in February:
2.36" - Average rainfall in March:
2.28" - Average rainfall in April:
2.36" - Average rainfall in May:
1.97" - Average rainfall in June:
2.09"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.75" - Average rainfall in September:
0.98" - Average rainfall in October:
1.46" - Average rainfall in November:
1.77" - Average rainfall in December:
1.97"
The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").
Average rainfall days
Hamilton, MT
- Average rainfall days in January:
11.9 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
18.8 days - Average rainfall days in April:
18.5 days - Average rainfall days in May:
19.5 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
8 days - Average rainfall days in August:
8.7 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
13.1 days - Average rainfall days in December:
12.9 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).
Average snowfall
Hamilton, MT
- Average snowfall in January:
11.89" - Average snowfall in February:
13.03" - Average snowfall in March:
9.09" - Average snowfall in April:
5.67" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Hamilton, MT
- Average snowfall days in January:
18.6 days - Average snowfall days in February:
19.3 days - Average snowfall days in March:
16 days - Average snowfall days in April:
10.3 days - Average snowfall days in May:
2.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.4 days - Average snowfall days in October:
3.5 days - Average snowfall days in November:
12.1 days - Average snowfall days in December:
18.6 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Hamilton, MT
- Average daylight in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 24min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 24min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 6min - Average sunshine in April:
8h and 54min - Average sunshine in May:
10h and 24min - Average sunshine in June:
11h and 0min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 42min - Average sunshine in September:
9h and 30min - Average sunshine in October:
7h and 18min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 24min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days
Hamilton, MT
- Average sunshine days in January:
10.2 days - Average sunshine days in February:
5.6 days - Average sunshine days in March:
6.3 days - Average sunshine days in April:
6.9 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
18.9 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
13.1 days - Average sunshine days in November:
10.4 days - Average sunshine days in December:
10 days
The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).
Average UV index
Hamilton, MT
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Hamilton, MT
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Hamilton, MT
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
