This report describes the historical weather record at the Augusta State Airport (Augusta, Maine, United States) during the last 12 months. This station has records back to January 1949.
Augusta, Maine has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (92%) and lakes and rivers (7%)
Daylight saving time (DST) was observed at Augusta, Maine during the last 12 months. There were two time changes during the last 12 months:
2013 is not a leap year, so it has 365 days and no February 29th. The first leap year before 2013 was 2012 and the first after will be 2016.
The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 2013 they occurred on:
|Spring Equinox||Wednesday, 20 March 2013.|
|Summer Solstice||Friday, 21 June 2013.|
|Fall Equinox||Sunday, 22 September 2013.|
|Winter Solstice||Saturday, 21 December 2013.|
The hottest day of the last 12 months was May 31, with a high temperature of 91°F. For reference, on that day the average high temperature is 69°F and the high temperature exceeds 80°F only one day in ten. The hottest month of the last 12 months was July with an average daily high temperature of 79°F.
Relative to the average, the hottest day was January 31. The high temperature that day was 56°F, compared to the average of 28°F, a difference of 28°F. In relative terms the warmest month was October, with an average high temperature of 60°F, compared to an typical value of 57°F.
The longest warm spell was from April 24 to May 9, constituting 16 consecutive days with warmer than average high temperatures. The month of October had the largest fraction of warmer than average days with 65% days with higher than average high temperatures.
The coldest day of the last 12 months was January 24, with a low temperature of -6°F. For reference, on that day the average low temperature is 11°F and the low temperature drops below -4°F only one day in ten. The coldest month of the last 12 months was January with an average daily low temperature of 14°F.
Relative to the average, the coldest day was June 13. The low temperature that day was 32°F, compared to the average of 54°F, a difference of 22°F. In relative terms the coldest month was November, with an average low temperature of 29°F, compared to an typical value of 31°F.
The longest cold spell was from April 26 to May 7, constituting 12 consecutive days with cooler than average low temperatures. The month of November had the largest fraction of cooler than average days with 73% days with lower than average low temperatures.
The longest freezing spell was from January 21 to January 29, constituting 9 consecutive days with temperatures strictly below freezing.
The clearest month of the last 12 months was August, with 61% of days being more clear than cloudy. The longest spell of clear weather was from April 25 to May 8, constituting 14 consecutive days that were clearer than they were cloudy.
The cloudiest month of the last 12 months was March, with 65% of days being more cloudy than clear. The longest spell of cloudy weather was from February 23 to March 8, constituting 14 consecutive days that were cloudier than they were clear.
This station reports both the quantity of liquid precipitation and categorical observations of precipitation (e.g., moderate rain, or heavy snow). Both are subject to erroneous reports, but the former is particularly prone to false reports, especially ones indicating an excessive quantity of precipitation. Please bear this in mind when reading the extrema reported in this section.
The day with the largest quantity of precipitation was August 9. That day saw 3.357" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.128". The month with the most precipitation was September, with 7.721", compared to a median value of 3.626".
As determined by quantitative measurements, the longest dry spell was from April 26 to May 8, constituting 13 consecutive days with no measured precipitation. The month with the largest fraction of dry days was March, with 71% of days reporting no measured precipitation at all.
The month with the largest fraction of days with at least some measured precipitation was July, with 58% of days reporting some measured precipitation.
This station reports when significant weather events (including precipitation) are visually observed at or near the station. Such events do not always correspond to measured quantities of liquid equivalent precipitation, such as when the event is near by not at the station, or in the case of solid precipitation that does not melt in the collection basin.
The day in the last 12 months with the most precipitation observations was February 24. There were 24 hourly weather reports that day (out of a maximum of 24) in which some form of precipitation was observated at or near the station. The month with the most precipitation observations was February, with 143 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from December 7 to January 2, constituting 27 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was December, with 84% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was July, with 68% of days reporting some observed precipitation.
In this section we consider only those weather reports that indicate liquid precipitation. For the purposes of this analysis, we include thunderstorms even though some thunderstorms are not accompanied by liquid precipitation.
The month of the last 12 months with the largest number of those reports was May, with a total of 132 reports. The day with the largest number of those reports was May 25, with a total of 24 reports.
This station reports when snow is observed falling but does not report the quantity of snow that has fallen or the depth of snow on the ground.
In this section we consider hourly weather reports that contain an observation of falling snow. These reports do not necessarily correspond to accumulation.
The first reported snow fall in the last 12 months was on January 6; the last was on December 2. The month of the last 12 months with the largest number of those reports was February, with a total of 111 reports. The day with the largest number of those reports was February 24, with a total of 24 reports.
Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.
When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of the last 12 months was April with an average daily low humidity of 36%, and the most humid month was December with an average daily low humidity of 66%.
But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.
Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.
Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.
To take some examples, and basing our categorization on the daily high dew point in the last 12 months, January had 30 dry days, 1 comfortable day, and no humid days; April had 28 dry days, 2 comfortable days, and no humid days; July had no dry days, 15 comfortable days, and 16 humid days; and October had 17 dry days, 14 comfortable days, and no humid days.
The highest sustained wind speed was 33 mph, occurring on February 9; the highest daily mean wind speed was 27 mph (February 9); and the highest wind gust speed was 53 mph (January 10).
The windiest month was March, with an average wind speed of 9 mph. The least windy month was October, with an average wind speed of 5 mph.
Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.
The day of the last 12 months with the lowest average visibility was January 13, with an average visibility of 0.4 mi. The month with the lowest average visibility was December, with an average visibility of 6.8 mi. With an average visibility of 9.5 mi, the month of October had the highest average visibility.
The cloud ceiling is the altitude of the lowest layer of clouds that are at categorized as broken (mostly cloudy) or overcast (cloudy). If no such cloud layer exists then the ceiling is unlimited and no value is reported.
The day of the last 12 months with the lowest average cloud ceiling was August 18, with an average cloud ceiling of 100'. The month with the lowest average cloud ceiling was December, with an average cloud ceiling of 2930'. The month of November has the highest average cloud ceiling, with an average cloud ceiling of 5691'.