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Average Weather in September at Sheringham Automatic Weather Reporting System Canada

At Sheringham Automatic Weather Reporting System, the month of September is characterized by gradually falling daily high temperatures, with daily highs decreasing by 4°F, from 65°F to 60°F over the course of the month, and rarely exceeding 73°F or dropping below 55°F.

Daily low temperatures decrease by 3°F, from 52°F to 50°F, rarely falling below 45°F or exceeding 56°F.

For reference, on August 2, the hottest day of the year, temperatures at Sheringham Automatic Weather Reporting System typically range from 53°F to 66°F, while on January 2, the coldest day of the year, they range from 38°F to 46°F.

Average High and Low Temperature in September

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in September

Average Hourly Temperature in September at Sheringham Automatic Weather Reporting System1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM4 AM8 AM12 PM4 PM8 PM12 AMAugOctcoldcool
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of September at Sheringham Automatic Weather Reporting System experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 35% to 48%.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 65% of the time.

For reference, on January 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

Cloud Cover Categories in September

Cloud Cover Categories in September at Sheringham Automatic Weather Reporting System181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 165%Sep 165%Sep 3052%Sep 3052%Sep 1161%Sep 1161%Sep 2158%Sep 2158%clearovercastmostly clearpartly cloudymostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Sheringham Automatic Weather Reporting System, the chance of a wet day over the course of September is very rapidly increasing, starting the month at 16% and ending it at 29%.

For reference, the year's highest daily chance of a wet day is 63% on November 17, and its lowest chance is 8% on August 1.

Probability of Precipitation in September

Probability of Precipitation in September at Sheringham Automatic Weather Reporting System181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%5%10%15%20%25%30%35%40%45%50%55%60%AugOctSep 116%Sep 116%Sep 3029%Sep 3029%Sep 1121%Sep 1121%Sep 2123%Sep 2123%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during September at Sheringham Automatic Weather Reporting System is rapidly increasing, starting the month at 1.5 inches, when it rarely exceeds 3.3 inches or falls below 0.2 inches, and ending the month at 3.5 inches, when it rarely exceeds 6.5 inches or falls below 0.7 inches.

Average Monthly Rainfall in September

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of September at Sheringham Automatic Weather Reporting System, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 41 minutes, implying an average daily decrease of 3 minutes, 29 seconds, and weekly decrease of 24 minutes, 21 seconds.

The shortest day of the month is September 30, with 11 hours, 42 minutes of daylight and the longest day is September 1, with 13 hours, 23 minutes of daylight.

Hours of Daylight and Twilight in September

Hours of Daylight and Twilight in September at Sheringham Automatic Weather Reporting System181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 10 minSep 2212 hr, 10 minnightnightdaydaySep 113 hr, 23 minSep 113 hr, 23 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month at Sheringham Automatic Weather Reporting System is 6:33 AM on September 1 and the latest sunrise is 40 minutes later at 7:14 AM on September 30.

The latest sunset is 7:56 PM on September 1 and the earliest sunset is 1 hour, 0 minutes earlier at 6:55 PM on September 30.

Daylight saving time is observed at Sheringham Automatic Weather Reporting System during 2017, but it neither starts nor ends during September, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:14 AM and sets 16 hours, 6 minutes later, at 9:20 PM, while on December 21, the shortest day of the year, it rises at 8:04 AM and sets 8 hours, 19 minutes later, at 4:23 PM.

Sunrise & Sunset with Twilight in September

The solar day over the course of September. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy at Sheringham Automatic Weather Reporting System is essentially constant during September, remaining around 0% throughout.

For reference, on June 27, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September

Humidity Comfort Levels in September at Sheringham Automatic Weather Reporting System181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%10%20%30%40%50%60%70%80%90%100%AugOctSep 10%Sep 10%Sep 300%Sep 300%Sep 110%Sep 110%Sep 210%Sep 210%drydrycomfortablecomfortablehumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Sheringham Automatic Weather Reporting System is essentially constant during September, remaining within 0.1 miles per hour of 2.4 miles per hour throughout.

For reference, on December 4, the windiest day of the year, the daily average wind speed is 3.8 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 2.2 miles per hour.

Average Wind Speed in September

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction at Sheringham Automatic Weather Reporting System throughout September is predominantly from the west, with a peak proportion of 64% on September 1.

Wind Direction in September

Wind Direction in September at Sheringham Automatic Weather Reporting SystemWS181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctwesteastsouthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Sheringham Automatic Weather Reporting System is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature at Sheringham Automatic Weather Reporting System is gradually decreasing during September, falling by 2°F, from 54°F to 52°F, over the course of the month.

Average Water Temperature in September

Average Water Temperature in September at Sheringham Automatic Weather Reporting System1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303048°F49°F50°F51°F52°F53°F54°F55°F56°F57°F58°FAugOctSep 154°FSep 154°FSep 3052°FSep 3052°FSep 1154°FSep 1154°FSep 2153°FSep 2153°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy at Sheringham Automatic Weather Reporting System is rapidly decreasing during September, falling by 1.8 kWh, from 5.2 kWh to 3.4 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September

Average Daily Incident Shortwave Solar Energy in September at Sheringham Automatic Weather Reporting System181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhAugOctSep 15.2 kWhSep 15.2 kWhSep 303.4 kWhSep 303.4 kWhSep 114.6 kWhSep 114.6 kWhSep 214.0 kWhSep 214.0 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Sheringham Automatic Weather Reporting System are 48.378 deg latitude, -123.920 deg longitude, and 0 ft elevation.

The topography within 2 miles of Sheringham Automatic Weather Reporting System contains significant variations in elevation, with a maximum elevation change of 791 feet and an average elevation above sea level of 103 feet. Within 10 miles contains significant variations in elevation (2,910 feet). Within 50 miles contains large variations in elevation (7,874 feet).

The area within 2 miles of Sheringham Automatic Weather Reporting System is covered by water (67%) and trees (28%), within 10 miles by water (55%) and trees (41%), and within 50 miles by trees (52%) and water (37%).

Data Sources

This report illustrates the typical weather at Sheringham Automatic Weather Reporting System year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Sheringham Automatic Weather Reporting System has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Malahat Automatic Weather Reporting System; Esquimalt Harbour, B. C.; William R Fairchild International Airport; Victoria International Airport; Victoria Harbour; Victoria Automatic Weather Reporting System; Victoria University; and Discovery Island.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.