Expand
Contents
- 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
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Lyman, Washington, with an average temperature ranging between min 33.6°F (0.9°C) and max 42.1°F (5.6°C). January's advent denotes a minor fluctuation in the average high-temperature to a still wintry 42.1°F (5.6°C) from December's 40.5°F (4.7°C). Weather in January »
Weather in February
February, the last month of the winter in Lyman, is another cold month, with temperature in the range of an average low of 32.5°F (0.3°C) and an average high of 42.4°F (5.8°C). The transition from January to February sees an average high-temperature of a still wintry 42.4°F (5.8°C), indicating a minor variance from the prior month. Weather in February »
Weather in March
March, the first month of the spring in Lyman, is a frosty month, with temperature in the range of an average high of 46.6°F (8.1°C) and an average low of 35.1°F (1.7°C). Lyman's transition from February to March introduces an average high-temperature of a frosty 46.6°F (8.1°C), marking an insignificant variation from the 42.4°F (5.8°C). Weather in March »
Weather in April
April is a fresh spring month in Lyman, Washington, with an average temperature fluctuating between 37.8°F (3.2°C) and 52°F (11.1°C). Lyman's transition into April brings a slight rise in the average high-temperature, moving from a chilly 46.6°F (8.1°C) in March to a fresh 52°F (11.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a mild month in Lyman, Washington, with temperature in the range of an average high of 60.6°F (15.9°C) and an average low of 42.8°F (6°C). Lyman in May experiences a slight uptick in the average high-temperature, adjusting from April's fresh 52°F (11.1°C) to a mild 60.6°F (15.9°C). Weather in May »
Weather in June
The first month of the summer, June, is an enjoyable month in Lyman, Washington, with an average temperature ranging between min 45.9°F (7.7°C) and max 64°F (17.8°C). As Lyman welcomes June, the average high-temperature stabilizes at an enjoyable 64°F (17.8°C), showing little deviation from May's 60.6°F (15.9°C). Weather in June »
Weather in July
July is an agreeable summer month in Lyman, Washington, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 70.9°F (21.6°C). The warmest month is July, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 49.1°F (9.5°C). Weather in July »
Weather in August
The last month of the summer, August, is also an agreeable month in Lyman, Washington, with an average temperature ranging between min 50.5°F (10.3°C) and max 70.7°F (21.5°C). The weather during August records an average high-temperature of a still agreeable 70.7°F (21.5°C), closely mirroring the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a comfortable month in Lyman, Washington, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 64.2°F (17.9°C). The transition into September subtly indicates a reduction in the average high-temperature, down to a refreshing 64.2°F (17.9°C) from August's agreeable 70.7°F (21.5°C). Weather in September »
Weather in October
October, the same as September, is a cool autumn month in Lyman, Washington, with an average temperature fluctuating between 42.4°F (5.8°C) and 55°F (12.8°C). In Lyman, the average high-temperature in October drops from an enjoyable 64.2°F (17.9°C) in September to a fresh 55°F (12.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Lyman, Washington, with an average temperature varying between 37.6°F (3.1°C) and 45.5°F (7.5°C). The shift to November brings a decrease in the average high-temperature, falling from a fresh 55°F (12.8°C) in October to a chilly 45.5°F (7.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Lyman, Washington, with temperature in the range of an average high of 40.5°F (4.7°C) and an average low of 32.5°F (0.3°C). December stands out as Lyman's coldest month, with temperatures ranging between an average high of 40.5°F (4.7°C) and a low of 32.5°F (0.3°C). Weather in December »
Updated: Jul 15, 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 are the most humid months?
The months with the highest humidity are January through March, with an average relative humidity of 86%.
How many days does it rain?
In Lyman, during the entire year, the rain falls for 203.2 days and collects up to 49.72" (1263mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
How many days does it snow?
In Lyman, during the entire year, snow falls for 12 days and aggregates up to 12.32" (313mm) of snow.
What are the months with the lowest UV index?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 4.3 days and accumulates 4.96" (126mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lyman, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
When it does not snow?
May through October are months without snowfall.
When are the longest days in Lyman?
The month with the longest days is June, with an average of 16h and 6min of daylight.
What is the hottest time of year?
The highest temperatures are recorded in July, with averages reaching a high of 70.9°F (21.6°C) and a low of 49.1°F (9.5°C).
What is the least humid month?
With an average relative humidity of 75%, July is the least humid month.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 9.8 days and typically collects 0.98" (25mm) of precipitation.
When is the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 5.
What month has the most sunshine?
August has the most sunshine of the year, with an average of 10.3h of sunshine.
What is the rainiest month?
November is the month with the most rainfall. Rain falls for 21.1 days and accumulates 7.09" (180mm) of precipitation.
What is the coldest month?
In Lyman, December registers the lowest temperatures, averaging 40.5°F (4.7°C) at the peak and 32.5°F (0.3°C) at the lowest.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 8h and 24min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 3.5h of sunshine.
Average temperature
Lyman, WA
The warmest month (with the highest average high temperature) is July (70.9°F).
The month with the lowest average high temperature is December (40.5°F).
The month with the highest average low temperature is August (50.5°F).
The coldest months (with the lowest average low temperature) are February and December (32.5°F).
Average pressure
Lyman, WA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
30.01"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed
Lyman, WA
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.4mph - Average wind speed in April:
4.7mph - Average wind speed in May:
3.9mph - Average wind speed in June:
3.7mph
- Average wind speed in July:
3.5mph - Average wind speed in August:
3.3mph - Average wind speed in September:
3.8mph - Average wind speed in October:
4.7mph - Average wind speed in November:
5.7mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is November (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity
Lyman, WA
The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is July (75%).
Average rainfall
Lyman, WA
- Average rainfall in January:
6.54" - Average rainfall in February:
5.12" - Average rainfall in March:
5.55" - Average rainfall in April:
4.17" - Average rainfall in May:
2.91" - Average rainfall in June:
2.24"
- Average rainfall in July:
0.98" - Average rainfall in August:
1.14" - Average rainfall in September:
2.76" - Average rainfall in October:
5.16" - Average rainfall in November:
7.09" - Average rainfall in December:
6.06"
The wettest month (with the highest rainfall) is November (7.09").
The driest month (with the least rainfall) is July (0.98").
Average rainfall days
Lyman, WA
- Average rainfall days in January:
18.8 days - Average rainfall days in February:
17.3 days - Average rainfall days in March:
22.1 days - Average rainfall days in April:
20.8 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
9.8 days - Average rainfall days in August:
9.4 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
17.7 days - Average rainfall days in November:
21.1 days - Average rainfall days in December:
20.6 days
The month with the highest number of rainy days is March (22.1 days).
The month with the least rainy days is August (9.4 days).
Average snowfall
Lyman, WA
The month with the highest snowfall is February (4.96").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Lyman, WA
- Average snowfall days in January:
2.6 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.1 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
0.7 days - Average snowfall days in December:
2.1 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Lyman, WA
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 2min - Average daylight in June:
16h and 1min
- Average daylight in July:
15h and 4min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 1min - Average daylight in December:
8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 1min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 1min - Average sunshine in November:
4h and 0min - Average sunshine in December:
3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days
Lyman, WA
- Average sunshine days in January:
9.9 days - Average sunshine days in February:
8.3 days - Average sunshine days in March:
7.3 days - Average sunshine days in April:
7.4 days - Average sunshine days in May:
12.7 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
18.8 days - Average sunshine days in August:
19.2 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
12.4 days - Average sunshine days in November:
7.8 days - Average sunshine days in December:
9 days
The month with the most sunshine days is August (19.2 days).
The month with the least sunshine days is March (7.3 days).
Average UV index
Lyman, WA
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Lyman, WA
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Lyman, WA
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).