Historical Weather For 2012 in Hot Springs, Arkansas, USA

Location

This report describes the historical weather record at the Hot Springs Memorial Field Airport (Hot Springs, Arkansas, United States) during 2012. This station has records back to December 1972.

Hot Springs, Arkansas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (92%) and lakes and rivers (6%)

Calendar

Daylight saving time (DST) was observed at Hot Springs, Arkansas during 2012. There were two time changes during 2012:

  • DST started on Sunday March 11, 2012 at 3:00 am, from CST (GMT-6) to CDT (GMT-5).
  • DST ended on Sunday November 4, 2012 at 1:00 am, from CDT (GMT-5) to CST (GMT-6).

2012 was a leap year and thus has 366 days rather than the normal 365. Leap years occur every fourth year and the extra day is always February 29th. In 2012 February 29th falls on a Wednesday.

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 2012 they occurred on:

Spring Equinox Tuesday, 20 March 2012.
Summer Solstice Wednesday, 20 June 2012.
Fall Equinox Saturday, 22 September 2012.
Winter Solstice Friday, 21 December 2012.

Temperature

The hottest day of 2012 was July 20, with a high temperature of 108°F. For reference, on that day the average high temperature is 93°F and the high temperature exceeds 100°F only one day in ten. The hottest month of 2012 was July with an average daily high temperature of 98°F.

Relative to the average, the hottest day was February 23. The high temperature that day was 80°F, compared to the average of 59°F, a difference of 21°F. In relative terms the warmest month was March, with an average high temperature of 74°F, compared to an typical value of 65°F.

The longest warm spell was from July 16 to August 11, constituting 27 consecutive days with warmer than average high temperatures. The month of May had the largest fraction of warmer than average days with 90% days with higher than average high temperatures.

Temperature

The daily low (blue) and high (red) temperature during 2012 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile). The bar at the top of the graph is red where both the daily high and low are above average, blue where they are both below average, and white otherwise.

The coldest day of 2012 was December 30, with a low temperature of 20°F. For reference, on that day the average low temperature is 34°F and the low temperature drops below 21°F only one day in ten. The coldest month of 2012 was January with an average daily low temperature of 36°F.

Relative to the average, the coldest day was February 12. The low temperature that day was 21°F, compared to the average of 36°F, a difference of 15°F. In relative terms the coldest month was November, with an average low temperature of 40°F, compared to an typical value of 43°F.

The longest cold spell was from April 17 to April 25, constituting 9 consecutive days with cooler than average low temperatures. The month of November had the largest fraction of cooler than average days with 63% days with lower than average low temperatures.

Hourly Temperature Bands

The full year of hourly temperature reports with the days of the year on the horizontal and the hours of the day on the vertical. The hourly temperature measurement is color coded into meaningful temperature bands: frigid is purple (below 15°F), freezing is blue (15°F to 32°F), cold is dark green (32°F to 50°F), cool is light green (50°F to 65°F), comfortable is yellow (65°F to 75°F), warm is light red (75°F to 85°F), hot is medium red (85°F to 100°F), sweltering is dark red (above 100°F), and missing data is pink.

Clouds

The clearest month of 2012 was August, with 84% of days being more clear than cloudy. The longest spell of clear weather was from July 28 to August 18, constituting 22 consecutive days that were clearer than they were cloudy.

Cloud Coverage

The fraction of time spent in each of the five sky cover categories over the course of 2012 on a daily basis. 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 of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data. The bar at the top of the graph is gray if the sky was cloudy or mostly cloudy for more than half the day, blue if it is clear or mostly clear for more than half the day, and blue-gray otherwise.

The cloudiest month of 2012 was December, with 52% of days being more cloudy than clear. The longest spell of cloudy weather was from November 30 to December 11, constituting 12 consecutive days that were cloudier than they were clear.

Hourly Cloud Coverage

The full year of hourly cloud coverage reports with the days of the year on the horizontal and the hours of the day on the vertical. The sky cover is color coded: from most blue to most gray, the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

This station reports the quantity of liquid precipitation but not observations of weather events in the area. For this reason, this section will only discuss the quantity of precipitation and not its type.

Liquid Equivalent Quantity

The day with the largest quantity of precipitation was September 14. That day saw 2.110" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.109". The month with the most precipitation was September, with 5.953", compared to a median value of 2.349".

As determined by quantitative measurements, the longest dry spell was from May 13 to May 30, constituting 18 consecutive days with no measured precipitation. The month with the largest fraction of dry days was May, with 90% of days reporting no measured precipitation at all.

The month with the largest fraction of days with at least some measured precipitation was September, with 33% of days reporting some measured precipitation.

Precipitation Quantity

The daily measured quantity of liquid (or liquid equivalent in the case of solid precipitation) precipitation over the course of 2012, with the median non-zero quantity (thick gray line) and 10th, 25th, 75th, and 90th non-zero percentiles (shaded areas). The bar at the top of the graph is green if any precipitation was measured that day and white otherwise.

Snow

Either snow is exceptionally rare at this location or this station did not reliably report it during 2012.

Humidity

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 2012 was June with an average daily low humidity of 32%, and the most humid month was December with an average daily low humidity of 49%.

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.

Humidity

The daily low (brown) and high (blue) relative humidity during 2012 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Dew 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 2012, January had 22 dry days, 9 comfortable days, and no humid days; April had 5 dry days, 24 comfortable days, and 1 humid day; July had no dry days, 1 comfortable day, and 30 humid days; and October had 10 dry days, 20 comfortable days, and 1 humid day.

Dew Point

The daily low (blue) and high (red) dew point during 2012 with the area between them shaded gray and superimposed over the corresponding averages (thick lines), and with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

The highest sustained wind speed was 28 mph, occurring on August 5; the highest daily mean wind speed was 17 mph (August 30); and the highest wind gust speed was 52 mph (April 2).

The windiest month was March, with an average wind speed of 6 mph. The least windy month was November, with an average wind speed of 3 mph.

Wind Speed

The daily low and high wind speed (light gray area) and the maximum daily wind gust speed (tiny blue dashes).

Visibility

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 2012 with the lowest average visibility was December 26, with an average visibility of 2.0 mi. The month with the lowest average visibility was December, with an average visibility of 8.9 mi. With an average visibility of 9.9 mi, the month of June had the highest average visibility.

Visibility

The daily average visibility, depicted as gray bars encroaching down from the top of the graph.

Cloud Ceiling

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 2012 with the lowest average cloud ceiling was April 18, with an average cloud ceiling of 98'. The month with the lowest average cloud ceiling was December, with an average cloud ceiling of 3110'. The month of August has the highest average cloud ceiling, with an average cloud ceiling of 7232'.

Cloud Ceiling

The daily average cloud ceiling, depicted as gray bars encroaching down from the top of the graph. Missing data or days with insufficient clouds to define a cloud ceiling are shown as white columns.