This report describes the typical weather at the New York City (New York, United States) weather station over the course of an average April 12. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
New York, New York has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by built-up areas (48%), oceans and seas (22%), forests (16%), grasslands (7%), and lakes and rivers (5%).
The temperature typically varies from 43°F to 54°F and is rarely below 35°F or above 67°F.
The coolest hours of the day are from 1am to 8am with the coldest at 6am, at which time the temperature is below 47°F three days out of four.
The warmest hours of the day are from noon to 6pm with the hottest at 4pm, at which time the temperature is above 47°F three days out of four.
The day has gained half its heat by 10am and lost it again by 9pm.
On April 12 the Sun rises at 6:21am and sets at 7:32pm.
Solar noon is at 12:56pm.
For reference, on the longest day of the year the Sun rises at 5:24am and sets at 8:30pm, while on the shortest day of the year it rises at 7:17am and sets at 4:31pm.
Astronomical twilight begins and ends 97 minutes before sunrise and after sunset at 4:44am and 9:09pm, respectively.
Nautical twilight begins and ends 61 minutes before sunrise and after sunset at 5:19am and 8:34pm, respectively.
Civil twilight begins and ends 28 minutes before sunrise and after sunset at 5:53am and 8:01pm, respectively.
Solar twilight begins and ends 36 minutes after sunrise and before sunset at 6:57am and 6:56pm, respectively.
The median cloud cover is 80% (partly cloudy) and does not vary substantially over the course of the day.
On average, the sky is clear or mostly clear 32% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 52% of the time.
There is a 48% chance that precipitation will be observed at some point during the day.
The average measured liquid-equivalent quantity of precipitation is 3.248". Among only those days for which there is at least some measured precipitation, the average is 12.703" and the total rarely exceeds 13.106".
When precipitation does occur it is most often in the form of slight rain (43% of days with precipitation have at worst slight rain), moderate rain (26%), slight snow (9%), and heavy rain (7%).
Precipitation is observed with more or less equal probability throughout the day.
Either snow is exceptionally unlikely to fall at this location on April 12 or this station does not reliably report precipitation types.
The relative humidity typically ranges from 55% (mildly humid) to 74% (humid), rarely dropping below 28% (dry), or exceeding 97% (very humid).
The air is driest at 3pm, at which time the relative humidity is less than 73% (humid) three days out of four; it is most humid at 5am, exceeding 60% (mildly humid) three days out of four.
The dew point ranges from 34°F to 35°F with an average of 34°F.
For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.
Sustained wind speeds typically vary from 7 mph to 12 mph (light breeze to gentle breeze) over the course of the day.
The peak sustained wind speed typically occurs around 3pm and is rarely outside the range 6 mph to 19 mph (light breeze to fresh breeze).
The wind is most calm around 5am, rarely exceeding 14 mph (moderate breeze).
The wind is most often out of the west (13% of the time), south west (12% of the time), north east (11% of the time), north (11% of the time), and north west (11% of the time).