This report describes the historical weather record at the Eppley Airfield (Omaha, Nebraska, United States) during 1967. This station has records back to January 1948.
Omaha, Nebraska has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (92%) and built-up areas (6%)
Daylight saving time (DST) was observed at Omaha, Nebraska during 1967. There were two time changes during 1967:
1967 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1967 was 1964 and the first after was 1968.
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 1967 they occurred on:
|Spring Equinox||Tuesday, 21 March 1967.|
|Summer Solstice||Thursday, 22 June 1967.|
|Fall Equinox||Saturday, 23 September 1967.|
|Winter Solstice||Friday, 22 December 1967.|
The hottest day of 1967 was May 25, with a high temperature of 96°F. For reference, on that day the average high temperature is 76°F and the high temperature exceeds 87°F only one day in ten. The hottest month of 1967 was July with an average daily high temperature of 84°F.
Relative to the average, the hottest day was February 14. The high temperature that day was 70°F, compared to the average of 37°F, a difference of 33°F. In relative terms the warmest month was March, with an average high temperature of 57°F, compared to an typical value of 50°F.
The longest warm spell was from March 21 to April 10, constituting 21 consecutive days with warmer than average high temperatures. The month of January had the largest fraction of warmer than average days with 68% days with higher than average high temperatures.
The coldest day of 1967 was December 27, with a low temperature of -9°F. For reference, on that day the average low temperature is 16°F and the low temperature drops below -1°F only one day in ten. The coldest month of 1967 was January with an average daily low temperature of 16°F.
Relative to the average, the coldest day was December 27. The low temperature that day was -9°F, compared to the average of 16°F, a difference of 25°F. In relative terms the coldest month was August, with an average low temperature of 60°F, compared to an typical value of 65°F.
The longest cold spell was from February 15 to February 26, constituting 12 consecutive days with cooler than average low temperatures. The month of May had the largest fraction of cooler than average days with 71% days with lower than average low temperatures.
The clearest month of 1967 was August, with 71% of days being more clear than cloudy. The longest spell of clear weather was from August 16 to August 23, constituting 8 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1967 was December, with 32% of days being more cloudy than clear. The longest spell of cloudy weather was from May 28 to June 2, constituting 6 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 June 5. That day saw 1.311" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.166". The month with the most precipitation was June, with 3.409", compared to a median value of 3.344".
As determined by quantitative measurements, the longest dry spell was from November 3 to November 29, constituting 27 consecutive days with no measured precipitation. The month with the largest fraction of dry days was November, 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 June, with 37% 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 1967 with the most precipitation observations was May 30. There were 8 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 May, with 34 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from November 6 to November 28, constituting 23 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was July, with 81% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was June, with 53% 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 1967 with the largest number of those reports was May, with a total of 30 reports. The day with the largest number of those reports was May 30, with a total of 8 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 1967 was on October 26; the last was on May 3. The month of 1967 with the largest number of those reports was February, with a total of 23 reports. The day with the largest number of those reports was January 7, with a total of 5 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 1967 was March with an average daily low humidity of 35%, and the most humid month was January with an average daily low humidity of 62%.
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 1967, January had 30 dry days, 1 comfortable day, and no humid days; April had 18 dry days, 12 comfortable days, and no humid days; July had no dry days, 16 comfortable days, and 15 humid days; and October had 18 dry days, 13 comfortable days, and no humid days.
The highest sustained wind speed was 36 mph, occurring on April 17; the highest daily mean wind speed was 26 mph (April 17);
The windiest month was April, with an average wind speed of 13 mph. The least windy month was July, with an average wind speed of 8 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 1967 with the lowest average visibility was March 12, with an average visibility of 2.3 mi. The month with the lowest average visibility was September, with an average visibility of 9.1 mi. With an average visibility of 11.0 mi, the month of October had the highest average visibility.
This station did not reliably report the cloud ceiling during 1967.