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Contents
- The climate of Los Alamos
- The best time to visit Los Alamos
- The worst time to visit Los Alamos
- Spring weather in Los Alamos
- Summer weather in Los Alamos
- Autumn weather in Los Alamos
- Winter weather in Los Alamos
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Los Alamos
Los Alamos, New Mexico, USA, lies within the Cfb Köppen climate classification, known as the marine west coast, with warm summers. This categorization is reflective of the weather patterns experienced throughout the year, notable for moderately warm temperatures and a somewhat equitable distribution of rainfall. Divergences in weather parameters, however, characterize each month, painting a dynamic portrait of Los Alamos' climate.
Throughout the year, monthly average high temperatures fluctuate from 37.9°F (3.3°C) in January to 81.3°F (27.4°C) in July. Low temperatures shift from 21.6°F (-5.8°C) in January and December to 59.2°F (15.1°C) in July. These values reveal the contrast between the bite of winter and the gentle warmth of summer. Los Alamos experiences a substantial swing in snowfall, witnessing 5.24" (133mm) in January and no snowfall from June to October.
In terms of precipitation, the city sees an average rainfall between 0.39" (10mm) in April and 2.56" (65mm) in July. Humidity also fluctuates, from 33% in June to 70% in January, bringing about variations in the environment's moisture content. The number of daylight hoursalso vary from month to month, with December possessing the fewest at 9.8 hours and June enjoying the most at 14.6 hours.
Throughout the year, monthly average high temperatures fluctuate from 37.9°F (3.3°C) in January to 81.3°F (27.4°C) in July. Low temperatures shift from 21.6°F (-5.8°C) in January and December to 59.2°F (15.1°C) in July. These values reveal the contrast between the bite of winter and the gentle warmth of summer. Los Alamos experiences a substantial swing in snowfall, witnessing 5.24" (133mm) in January and no snowfall from June to October.
In terms of precipitation, the city sees an average rainfall between 0.39" (10mm) in April and 2.56" (65mm) in July. Humidity also fluctuates, from 33% in June to 70% in January, bringing about variations in the environment's moisture content. The number of daylight hoursalso vary from month to month, with December possessing the fewest at 9.8 hours and June enjoying the most at 14.6 hours.
The best time to visit Los Alamos
Given the climate characteristics and weather patterns, the best time to visit Los Alamos hinges on the visitor's preference for either warm or cold weather. If outdoor leisure activities are a priority, the months between May and September offer the most sunlight, with temperatures ranging from 59.7°F (15.4°C) to 80.6°F (27°C). These months provide ample daylight ranging from 13.1 hours to 14.6 hours, perfect for exploring outdoors. The lower humidity levels during these months, particularly in May (35%) and June(33%), might provide a more comfortable experience.
The worst time to visit Los Alamos
On the flip side, the colder months from November through February could be a less appealing time to visit for those not fond of colder temperatures. Average high temperatures drop to between 37.9°F (3.3°C) and 49.5°F (9.7°C) during these months while the lowest temperatures can hit between 21.6°F (-5.8°C) to 29.5°F (-1.4°C). Snowfall becomes an everyday reality during these months, with January experiencing an average of 5.24" (133mm) of snow.
Spring weather in Los Alamos
Spring in Los Alamos sees an increase in temperature, with the monthly high temperature rising from 52.3°F (11.3°C) in March to 68.5°F (20.3°C) in May. Conversely, the monthly lows grow from 31.5°F (-0.3°C) to 43.7°F (6.5°C). This season witnesses a decrease in snowfall from 1.54" (39mm) in March to no snowfall in May. Rainfall sees a gradual decrease from 0.71" (18mm) in March to 0.67" (17mm) in May, while humidity levels drop fairly steeply.
Summer weather in Los Alamos
Summers in Los Alamos are notably warm, with temperatures peaking at 81.3°F (27.4°C) in July. Low temperatures, on the other hand, vary from 54.7°F (12.6°C) to 59.2°F (15.1°C) during these months. Rainfall sees a sharp increase, especially in July, where it hits a record 2.56" (65mm). Humidity levels climb up during this season, making it the wettest period of the year in Los Alamos.
Autumn weather in Los Alamos
Fall in Los Alamos is characterized by a decline in temperatures, with highs falling from 73.9°F (23.3°C) in September to 49.5°F (9.7°C) in November. Lows correspondingly decrease from 51.6°F (10.9°C) to 29.5°F (-1.4°C). Rainfall drops significantly from 1.22" (31mm) in September to 0.63" (16mm) in November, while snowfall begins to appear in November.
Winter weather in Los Alamos
Winter witness drastic drops in temperature with highs averaging from 38.8°F (3.8°C) in December to 37.9°F (3.3°C) in January. The lows fall hefty into the low twenties. Snowfall is at its peak with 5.24" (133mm) in January before falling to 4.96" (126mm) in December. Rainfall in winters is relatively low, making this period the driest amongst all seasons.
Weather in January
January in Los Alamos, New Mexico marks the outset of the year with a chilly atmosphere. The city remains cloaked under thick coats of winter frost. An intriguing mix of snowy landscapes and cold breezes characterizes this month. Weather in January »
Weather in February
Moving forward, the weather in February eases from the extreme cold of January to a slightly warmer state, signaling the transition towards spring. Despite remaining the bastion of winter, Los Alamos encounters a decrease in snowfall, preparing the region for the warmer months ahead. Weather in February »
Weather in March
Los Alamos welcomes the early stages of spring in March. The city shifts from winter lows to a more pleasant and warm climate. However, the remnants of winter are not entirely shed. A high of 52.3°F (11.3°C) indicates the transformation towards spring while the dropping snowfall indicates the city's winter might. Weather in March »
Weather in April
April extends the warm embrace of spring across Los Alamos. The weather conditions shift dramatically in favor of warm sunshine as winter fades into memory. Donning the characteristic light drizzle, the valley is awash with vivid hues of blossoming flowers and leaves. Weather in April »
Weather in May
May stands at the threshold between spring and summer in Los Alamos. The town basks in a pleasant climate, perfect for outdoor activities and exploring the outdoors. Witness the stunning sights of the valley dipped in the splendid light of longer days. Weather in May »
Weather in June
Stepping into summer, June in Los Alamos is a vibrant and lively month. As the mercury levels continue to rise, the town makes a smooth transition into memorable summer. In complete contrast to the frigid winters, the city pulsates with the summer heat and lush, green landscapes. Weather in June »
Weather in July
July witnesses the zenith of the summer months in Los Alamos. The city basks in the glory of sunny days and clear skies high above. Nevertheless, this high-temperature month is not devoid of a significant share of rainfall. The city endures the year's highest rainfall measuring 2.56" (65mm), bringing the occasional refreshing respite from the summer heat. Weather in July »
Weather in August
August in Los Alamos continues the summer rhythm but begins the slow downward trend in temperature. Treading the fine balance between the summer warmth and anticipated coolness, the city presents an admixture of climates. Though the weather oscillates around a high of 79.7°F (26.5°C), it inclines towards the upcoming fall patterns. Weather in August »
Weather in September
September marks the beginning of fall in Los Alamos. The summer heat tapers off to give way to a cooler and cozier ambit. The city is decorated in hues of orange and brown as the telltale signs of autumn make an appearance. With the temperature dropping to 73.9°F (23.3°C), the city displays a kaleidoscope of warm fall colors. Weather in September »
Weather in October
October brings in the heart of the fall season. It is a magical time with weather conditions idyllic for outdoor activities and long strolls. The city witnesses a significant drop in temperature compared to September. However, a high of 61.5°F (16.4°C) renders October a popular traveling period, with tourists flocking to enjoy the unspoiled beauty of the fall season in the city. October involves a decrease in temperature, down from a warm 73.9°F (23.3°C) in September to a comfortable 61.5°F (16.4°C). Weather in October »
Weather in November
November introduces the chill of approaching winters. As temperatures continue to drop, Los Alamos prepares to bid goodbye to the vibrant fall and welcome the cold winter. A tangible crispness hangs in the air, signaling a change. Weather in November »
Weather in December
December brings with it the return of winter in Los Alamos. The weather turns harsher and colder, marking the onset of the winter solstice. The sight of falling snowflakes becomes a common spectacle, painting a picturesque white landscape. Weather in December »
Updated: Jul 31, 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
What part of the year is the coldest?
January is the coldest month, with an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 21.6°F (-5.8°C).
What is the most humid month?
The most humid month is January, with an average relative humidity of 70%.
How many days does it rain in Los Alamos?
Throughout the year, there are 106.2 rainfall days, and 12.05" (306mm) of precipitation is accumulated.
When does it snow?
January through May, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 7.1 days and accumulates 5.24" (133mm) of snow.
How many days does it snow?
In Los Alamos, during the entire year, snow falls for 30.9 days and aggregates up to 19.69" (500mm) of snow.
What is the month with the least sunshine?
The months with the least sunshine are January, February and December, with an average of 7.1h of sunshine.
When is the lowest UV index?
The months with the lowest UV index in Los Alamos are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST)?
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.
What is the driest month in Los Alamos?
The month with the least rainfall is April, when the rain falls for 7.5 days and typically collects 0.39" (10mm) of precipitation.
What is the least humid month?
With an average relative humidity of 33%, June is the least humid month.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 14h and 36min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 12.1h of sunshine.
When is the highest UV index?
With an average maximum UV index of 6, June is the month with the highest UV index.
What time of the year is the hottest?
The temperatures reach their highest averages in July, with highs of 81.3°F (27.4°C) and lows of 59.2°F (15.1°C).
What is the wettest month?
July is the month with the most rainfall. Rain falls for 18.2 days and accumulates 2.56" (65mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 48min of daylight.
Average temperature
Los Alamos, NM
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (37.9°F).
The month with the highest average low temperature is July (59.2°F).
The coldest months (with the lowest average low temperature) are January and December (21.6°F).
Average pressure
Los Alamos, NM
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
29.99"Hg - Average pressure in April:
29.89"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
30"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).
Average wind speed
Los Alamos, NM
- Average wind speed in January:
5.8mph - Average wind speed in February:
6.5mph - Average wind speed in March:
7.3mph - Average wind speed in April:
8.1mph - Average wind speed in May:
8mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.6mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6mph - Average wind speed in December:
5.8mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Los Alamos, NM
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is June (33%).
Average rainfall
Los Alamos, NM
- Average rainfall in January:
0.79" - Average rainfall in February:
0.71" - Average rainfall in March:
0.71" - Average rainfall in April:
0.39" - Average rainfall in May:
0.67" - Average rainfall in June:
0.75"
- Average rainfall in July:
2.56" - Average rainfall in August:
1.97" - Average rainfall in September:
1.22" - Average rainfall in October:
0.91" - Average rainfall in November:
0.63" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is April (0.39").
Average rainfall days
Los Alamos, NM
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
7.5 days - Average rainfall days in May:
7.1 days - Average rainfall days in June:
8.6 days
- Average rainfall days in July:
18.2 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
11.7 days - Average rainfall days in October:
6.9 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is November (5.1 days).
Average snowfall
Los Alamos, NM
- Average snowfall in January:
5.24" - Average snowfall in February:
4.02" - Average snowfall in March:
1.54" - Average snowfall in April:
0.94" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Los Alamos, NM
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
3.5 days - Average snowfall days in April:
1.5 days - Average snowfall days in May:
0.3 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 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
8.1 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Los Alamos, NM
- Average daylight in January:
10h and 1min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 2min - Average daylight in December:
9h and 5min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
7h and 1min - Average sunshine in February:
7h and 1min - Average sunshine in March:
9h and 4min - Average sunshine in April:
11h and 2min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
11h and 2min - Average sunshine in October:
7h and 3min - Average sunshine in November:
7h and 3min - Average sunshine in December:
7h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 6min).
Average sunshine days
Los Alamos, NM
- Average sunshine days in January:
21.8 days - Average sunshine days in February:
18.5 days - Average sunshine days in March:
19.8 days - Average sunshine days in April:
19.3 days - Average sunshine days in May:
20.8 days - Average sunshine days in June:
18.4 days
- Average sunshine days in July:
8.9 days - Average sunshine days in August:
10 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
21.8 days - Average sunshine days in November:
22.8 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (8.9 days).
Average UV index
Los Alamos, NM
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Los Alamos, NM
The month with the most cloud cover is January (Cloud cover 22).
The month with the least cloud cover is June (Cloud cover 10).
Average visibility
Los Alamos, NM
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Los Alamos, New Mexico, USA
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