Average Weather On June 21 For Homer, Alaska, USA

Location

This report describes the typical weather at the Homer Airport (Homer, Alaska, United States) weather station over the course of an average June 21. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.

Homer, Alaska has a continental climate with short dry cool summers. The area within 25 mi of this station is covered by shrublands (48%), oceans and seas (35%), and tundra (12%).

Temperature

The temperature typically varies from 46°F to 56°F and is rarely below 41°F or above 60°F.

Temperature

Average hourly temperature (black) with percentil bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The coolest hours of the day are from 1am to 7am with the coldest at 5am, at which time the temperature is below 49°F three days out of four.

The warmest hours of the day are from 11am to 9pm with the hottest at 3pm, at which time the temperature is above 53°F three days out of four.

The day has gained half its heat by 9am and lost it again by midnight.

Temperature Bands

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

On June 21 the Sun rises at 4:45am and sets at 11:30pm.

Solar noon is at 2:07pm.

For reference, on the longest day of the year the Sun rises at 4:45am and sets at 11:30pm, while on the shortest day of the year it rises at 10:04am and sets at 4:04pm.

Civil twilight begins and ends 95 minutes before sunrise and after sunset at 3:09am and 1:06am, respectively.

Solar twilight begins and ends 78 minutes after sunrise and before sunset at 6:04am and 10:11pm, respectively.

Solar Elevation

Elevation of the Sun above (positive) or below (negative) the horizon (black line). Yellow and gray fills indicate day and night, respectively. Light gray lines are the corresponding curves for the winter and summer equinoxes.

Clouds

The median cloud cover is 91% (mostly cloudy) and does not vary substantially over the course of the day.

On average, the sky is clear or mostly clear 26% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 59% of the time.

Median Cloud Cover

Median hourly cloud coverage fraction (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

There is a 45% chance that precipitation will be observed at some point during the day.

The average measured liquid-equivalent quantity of precipitation is 0.008". Among only those days for which there is at least some measured precipitation, the average is 0.066" and the total rarely exceeds 0.131".

Probability of Precipitation

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

When precipitation does occur it is most often in the form of slight rain (82% of days with precipitation have at worst slight rain) and moderate rain (11%).

Precipitation is most likely around 6am and least likely around 8pm.

Types of Precipitation

Relative frequency of various types of precipitation over the course of a typical June 21.

Snow

Either snow is exceptionally unlikely to fall at this location on June 21 or this station does not reliably report precipitation types.

Humidity

The relative humidity typically ranges from 68% (mildly humid) to 86% (very humid), rarely dropping below 55% (mildly humid), or exceeding 96% (very humid).

The air is driest at 3pm, at which time the relative humidity is less than 75% (humid) three days out of four; it is most humid at 4am, exceeding 81% (humid) three days out of four.

Relative Humidity

Average hourly humidity (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

The dew point ranges from 42°F to 45°F with an average of 44°F.

For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.

Dew Point

Average hourly dew point (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Wind

Sustained wind speeds typically vary from 4 mph to 12 mph (light breeze to moderate breeze) over the course of the day.

The peak sustained wind speed typically occurs around 4pm and is rarely outside the range 7 mph to 17 mph (light breeze to moderate breeze).

The wind is most calm around 6am, rarely exceeding 9 mph (gentle breeze).

Wind Speed

Average hourly wind speed (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

The wind is most often out of the west (28% of the time), south west (19% of the time), and north east (11% of the time). The wind is least often out of the north west (3% of the time) and north (4% of the time).

Wind Directions

The fraction of time spent with the wind blowing from the various directions over the entire day. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Wind Directions Over Day

The fraction of time spent with the wind blowing from the various directions on an hourly basis. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.