This report describes the typical weather at the New York City (New York, United States) weather station over the course of an average June 20. 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 63°F to 75°F and is rarely below 55°F or above 85°F.
The coolest hours of the day are from 2am to 8am with the coldest at 6am, at which time the temperature is below 67°F three days out of four.
The warmest hours of the day are from noon to 6pm with the hottest at 2pm, at which time the temperature is above 70°F three days out of four.
The day has gained half its heat by 10am and lost it again by 9pm.
On June 20 the Sun rises at 5:24am and sets at 8:30pm.
Solar noon is at 12:57pm.
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 126 minutes before sunrise and after sunset at 3:18am and 10:37pm, respectively.
Nautical twilight begins and ends 75 minutes before sunrise and after sunset at 4:08am and 9:46pm, respectively.
Civil twilight begins and ends 33 minutes before sunrise and after sunset at 4:50am and 9:04pm, respectively.
Solar twilight begins and ends 40 minutes after sunrise and before sunset at 6:05am and 7:49pm, respectively.
The median cloud cover ranges from 69% (partly cloudy) to 81% (mostly cloudy).
At 1am, the clearest time of the day, the sky is clear, mostly clear, or partly cloudy 47% of the time, and overcast or mostly cloudy 47% of the time.
At 4pm, the cloudiest time of the day, the sky is overcast, mostly cloudy, or partly cloudy 70% of the time, and clear or mostly clear 27% of the time.
The sky is typically clearing in earnest by 10pm.
The clouds have typically started forming in earnest by 5am.
There is a 40% chance that precipitation will be observed at some point during the day.
The average measured liquid-equivalent quantity of precipitation is 0.062". Among only those days for which there is at least some measured precipitation, the average is 0.294" and the total rarely exceeds 0.670".
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 (28%), thunderstorms (14%), heavy rain (9%), and drizzle (6%).
Precipitation is observed with more or less equal probability throughout the day.
Either snow is exceptionally unlikely to fall at this location on June 20 or this station does not reliably report precipitation types.
The relative humidity typically ranges from 61% (mildly humid) to 83% (humid), rarely dropping below 39% (comfortable), or exceeding 99% (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 74% (humid) three days out of four.
The dew point ranges from 58°F to 59°F with an average of 58°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 5 mph to 10 mph (light breeze to gentle breeze) over the course of the day.
The peak sustained wind speed typically occurs around 4pm and is rarely outside the range 4 mph to 16 mph (light breeze to moderate breeze).
The wind is most calm around 4am, rarely exceeding 11 mph (gentle breeze).
The wind is most often out of the south west (20% of the time), west (14% of the time), and south (11% of the time). The wind is least often out of the south east (5% of the time) and east (5% of the time).