Climate and monthly weather forecastJohnstown, Ireland
Climate and monthly weather forecast
Weather in January
January, the same as December, in Johnstown, Ireland, is a frosty winter month, with an average temperature ranging between max 6.6°C (43.9°F) and min 1.9°C (35.4°F). The coldest month is January, with an average high-temperature of 6.6°C (43.9°F) and an average low-temperature of 1.9°C (35.4°F). Weather in January »Weather in February
February, the last month of the winter in Johnstown, is another chilly month, with an average temperature ranging between min 1.8°C (35.2°F) and max 7.2°C (45°F). Johnstown's weather in February displays an average high-temperature of a still frosty 7.2°C (45°F), showing minor disparity from January's 6.6°C (43.9°F). Weather in February »Weather in March
March, the first month of the spring in Johnstown, is also a frosty month, with an average temperature varying between 8.8°C (47.8°F) and 2°C (35.6°F). As February transitions into March, Johnstown records an average high-temperature of a still chilly 8.8°C (47.8°F), showing a gentle shift from the preceding month. Weather in March »Weather in April
April in Johnstown, Ireland, is a cool spring month, with an average temperature fluctuating between 3.8°C (38.8°F) and 11.2°C (52.2°F). April's onset sees an average high-temperature of a fresh 11.2°C (52.2°F), exhibiting a slight fluctuation from the previous month. Weather in April »Weather in May
May, the last month of the spring in Johnstown, is a moderate month, with an average temperature varying between 13.6°C (56.5°F) and 6°C (42.8°F). As May takes its course, Johnstown's average high-temperature registers at a mild 13.6°C (56.5°F), closely aligning with the preceding month. Weather in May »Weather in June
The first month of the summer, June, is a comfortable month in Johnstown, Ireland, with temperature in the range of an average high of 16.1°C (61°F) and an average low of 8.8°C (47.8°F). Johnstown greets June with an average high-temperature of a comfortable 16.1°C (61°F), marking a slight deviation from the preceding month. Weather in June »Weather in July
July, like June, in Johnstown, Ireland, is another comfortable summer month, with temperature in the range of an average low of 10.7°C (51.3°F) and an average high of 17.4°C (63.3°F). Johnstown notes the warmest temperatures in July, with a high average of 17.4°C (63.3°F) and a low of 10.7°C (51.3°F). Weather in July »Weather in August
August, the last month of the summer in Johnstown, is another comfortable month, with an average temperature ranging between min 10.3°C (50.5°F) and max 17.1°C (62.8°F). Johnstown's weather in August displays an average high-temperature of a still refreshing 17.1°C (62.8°F), showing minor disparity from July's 17.4°C (63.3°F). Weather in August »Weather in September
The first month of the autumn, September, is also a moderate month in Johnstown, Ireland, with temperature in the range of an average high of 15.1°C (59.2°F) and an average low of 8.5°C (47.3°F). September's arrival registers an average high-temperature of a still refreshing 15.1°C (59.2°F), closely aligning with the temperature of the previous month. Weather in September »Weather in October
October, the same as September, is a cool autumn month in Johnstown, Ireland, with an average temperature varying between 7°C (44.6°F) and 12.5°C (54.5°F). October's climate shows a minor adjustment in average high-temperatures to a cool 12.5°C (54.5°F) from September's 15.1°C (59.2°F). Weather in October »Weather in November
November, the last month of the autumn in Johnstown, is also a frosty month, with an average temperature ranging between min 3.9°C (39°F) and max 8.9°C (48°F). As November begins, there is a minor decrease in the average high-temperature, softly falling from a fresh 12.5°C (54.5°F) in October to a chilly 8.9°C (48°F). Weather in November »Weather in December
December, the first month of the winter in Johnstown, is also a frosty month, with temperature in the range of an average high of 7°C (44.6°F) and an average low of 2.4°C (36.3°F). The onset of December brings with it an average high-temperature of a still chilly 7°C (44.6°F), showing a negligible variation from the month before. Weather in December »Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest temperatures occur during January, when averages reach a peak of 6.6°C (43.9°F) and a low of 1.9°C (35.4°F).
The months with the least rainfall in Johnstown, Ireland, are January and October Rain falls for 10.5 days and accumulates 13mm (0.51") of rain.
In Johnstown, during the entire year, the rain falls for 142.7 days and collects up to 221mm (8.7") of precipitation.
January through April, November and December are months with snowfall in Johnstown.
The months with the most snowfall are January and February, with an average 15mm (0.59") of accumulated snow.
Throughout the year, in Johnstown, Ireland, there are 9.7 snowfall days, and 45mm (1.77") of snow is accumulated.
The months with the lowest UV index in Johnstown, Ireland, are January through March, November and December, with an average maximum UV index of 2.
The month with the least sunshine is February, with an average of 3.6h of sunshine.
April and May, with an average relative humidity of 86%, are the least humid months in Johnstown, Ireland.
The month with the most sunshine in Johnstown is April, with an average of 6.2h of sunshine.
May through October are months without snowfall.
May, June and August, with an average maximum UV index of 4, are months with the highest UV index.
The month with the longest days is June, with an average of 16h and 54min of daylight.
Johnstown's warmest month, July, registers temperatures that range from a high of 17.4°C (63.3°F) to a low of 10.7°C (51.3°F).
August is the month with the most rainfall. Rain falls for 13.8 days and accumulates 26mm (1.02") of precipitation.
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts in Johnstown, Ireland, and the time zone changes from IST to GMT. Daylight Saving Time ends on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to IST.
The most humid month in Johnstown is December, with an average relative humidity of 92%.
December has the shortest days of the year, with an average of 7h and 36min of daylight.
Average temperature
Johnstown, Ireland
The warmest month (with the highest average high temperature) is July (17.4°C).
The month with the lowest average high temperature is January (6.6°C).
The month with the highest average low temperature is July (10.7°C).
The coldest month (with the lowest average low temperature) is February (1.8°C).
Average pressure
Johnstown, Ireland
- Average pressure in January:
1011.6mbar - Average pressure in February:
1011.2mbar - Average pressure in March:
1014.2mbar - Average pressure in April:
1014.7mbar - Average pressure in May:
1016mbar - Average pressure in June:
1015.3mbar
- Average pressure in July:
1014.1mbar - Average pressure in August:
1012.9mbar - Average pressure in September:
1015.4mbar - Average pressure in October:
1012.7mbar - Average pressure in November:
1008.3mbar - Average pressure in December:
1011.1mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed
Johnstown, Ireland
- Average wind speed in January:
19.7km/h - Average wind speed in February:
19.6km/h - Average wind speed in March:
17.5km/h - Average wind speed in April:
14.8km/h - Average wind speed in May:
14.8km/h - Average wind speed in June:
13.1km/h
- Average wind speed in July:
12.9km/h - Average wind speed in August:
14.1km/h - Average wind speed in September:
14.2km/h - Average wind speed in October:
15.5km/h - Average wind speed in November:
17.4km/h - Average wind speed in December:
19.6km/h
The windiest month (with the highest average wind speed) is January (19.7km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity
Johnstown, Ireland
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and May (86%).
Average rainfall
Johnstown, Ireland
The wettest month (with the highest rainfall) is August (26mm).
The driest months (with the least rainfall) are January and October (13mm).
Average rainfall days
Johnstown, Ireland
- Average rainfall days in January:
10.5 days - Average rainfall days in February:
10.2 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
12.1 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
11.3 days - Average rainfall days in December:
11 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is October (9.8 days).
Average snowfall
Johnstown, Ireland
The months with the highest snowfall are January and February (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Johnstown, Ireland
- Average snowfall days in January:
2.3 days - Average snowfall days in February:
2.7 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.5 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:
0.3 days - Average snowfall days in December:
1.6 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Johnstown, Ireland
- Average daylight in January:
8h and 12min - Average daylight in February:
9h and 54min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 54min - Average daylight in June:
16h and 54min
- Average daylight in July:
16h and 24min - Average daylight in August:
14h and 42min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 36min - Average daylight in November:
8h and 42min - Average daylight in December:
7h and 36min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
3h and 36min - Average sunshine in March:
4h and 54min - Average sunshine in April:
6h and 12min - Average sunshine in May:
6h and 6min - Average sunshine in June:
6h and 0min
- Average sunshine in July:
5h and 24min - Average sunshine in August:
5h and 24min - Average sunshine in September:
5h and 36min - Average sunshine in October:
3h and 42min - Average sunshine in November:
3h and 48min - Average sunshine in December:
3h and 54min
The month with the most sunshine is April (Average sunshine: 6h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days
Johnstown, Ireland
- Average sunshine days in January:
15.7 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
7.8 days - Average sunshine days in August:
8.1 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
15.2 days - Average sunshine days in November:
15.1 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is December (15.8 days).
The month with the least sunshine days is July (7.8 days).
Average UV index
Johnstown, Ireland
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Johnstown, Ireland
The month with the most cloud cover is July (Cloud cover 69).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility
Johnstown, Ireland
The months with the highest visibility are January, February, March and December (9km).
The month with the lowest visibility is July (7km).
