This report describes the historical weather record at the Ellington Field (Houston, Texas, United States) during 1951. This station has records back to January 1950.
Houston, Texas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (59%), built-up areas (17%), oceans and seas (13%), and grasslands (6%)
Daylight saving time (DST) was observed at Houston, Texas during 1951. There were two time changes during 1951:
1951 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1951 was 1948 and the first after was 1952.
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 1951 they occurred on:
|Spring Equinox||Wednesday, 21 March 1951.|
|Summer Solstice||Friday, 22 June 1951.|
|Fall Equinox||Sunday, 23 September 1951.|
|Winter Solstice||Saturday, 22 December 1951.|
The hottest day of 1951 was July 19, with a high temperature of 101°F. For reference, on that day the average high temperature is 92°F and the high temperature exceeds 95°F only one day in ten. The hottest month of 1951 was August with an average daily high temperature of 95°F.
Relative to the average, the hottest day was December 20. The high temperature that day was 83°F, compared to the average of 63°F, a difference of 20°F. In relative terms the warmest month was December, with an average high temperature of 69°F, compared to an typical value of 63°F.
The longest warm spell was from February 17 to March 12, constituting 24 consecutive days with warmer than average high temperatures. The month of February had the largest fraction of warmer than average days with 79% days with higher than average high temperatures.
The coldest day of 1951 was February 2, with a low temperature of 15°F. For reference, on that day the average low temperature is 45°F and the low temperature drops below 36°F only one day in ten. The coldest month of 1951 was January with an average daily low temperature of 44°F.
Relative to the average, the coldest day was February 2. The low temperature that day was 15°F, compared to the average of 45°F, a difference of 30°F. In relative terms the coldest month was April, with an average low temperature of 58°F, compared to an typical value of 64°F.
The longest cold spell was from May 16 to June 8, constituting 24 consecutive days with cooler than average low temperatures. The month of May had the largest fraction of cooler than average days with 90% days with lower than average low temperatures.
The clearest month of 1951 was August, with 77% of days being more clear than cloudy. The longest spell of clear weather was from September 28 to October 13, constituting 16 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1951 was March, with 32% of days being more cloudy than clear. The longest spell of cloudy weather was from March 17 to March 21, constituting 5 consecutive days that were cloudier than they were clear.
This station provides hourly reports of significant weather events at and around the station, but does not report the quantity of precipitation at the station itself. This is common for weather stations located outside of the United States, and for a small subset of stations in the United States that are located at lesser used and smaller airports.
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 1951 with the most precipitation observations was September 13. There were 22 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 January, with 103 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from September 27 to October 18, constituting 22 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was August, with 87% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was September, with 47% of days reporting some observed precipitation.
Either snow is exceptionally rare at this location or this station did not reliably report it during 1951.
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 1951 was August with an average daily low humidity of 46%, and the most humid month was February with an average daily low humidity of 60%.
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 1951, January had 11 dry days, 17 comfortable days, and 3 humid days; April had 2 dry days, 16 comfortable days, and 12 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had no dry days, 14 comfortable days, and 17 humid days.
The highest sustained wind speed was 37 mph, occurring on April 30; the highest daily mean wind speed was 20 mph (April 30);
The windiest month was January, with an average wind speed of 11 mph. The least windy month was July, 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 1951 with the lowest average visibility was February 14, with an average visibility of 2.0 mi. The month with the lowest average visibility was February, with an average visibility of 7.9 mi. With an average visibility of 10.9 mi, the month of August 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 1951 with the lowest average cloud ceiling was October 27, with an average cloud ceiling of 56'. The month with the lowest average cloud ceiling was February, with an average cloud ceiling of 3557'. The month of July has the highest average cloud ceiling, with an average cloud ceiling of 13207'.