Merle, William; Symons, George James [Hrsg.]: Merle's MS. Consideraciones temperiei pro 7 annis. Per Magistrum Willelmum Merle, Socium Domus De Merton: The earliest known journal of the weather: kept by the Rev. William Merle, Rector of Driby, Lincolnshire 1337 - 1344 (London, 1891)

September, ist and 4th, light rain. 5th and 8th, slight hoar-frost, nth, very light rain. A.D, 1340.
13th and 14th, heavier rain and light wind. 15th, rather strong wind. 15th and 17th, very light
rain. 18th, much rain. igth, light rain, and on the 20th, 21st, 22nd and 24th, likewise. 23rd,
about noon strong wind, which lasted only an hour, I believe. 25th, much rain and wind. 27th and
28th, light rain or kind of fog which came from the sea, that is, from the N.E. On the 29th, likewise.
Note that the rain between the 17th and 26th penetrated rather considerably. 30th, light rain.

October, ist, 6th and 12th, light rain. 4th, very light rain. In the first week there was a
light wind occasionally. The second week was serene with clouds now and then. In the third week
there was rain, except on the first day, which was heavier on the fourth and sixth than on other days of
the week. On the second and third days of this week there was a light wind, but on the fourth and
sixth it was strong, and it was stronger on the fourth than on the sixth day. And note that the wind
in the first half of October and in the end of September was for the most part South. In the fourth
week, on the second day, there was hoar-frost, light rain, and wind ; on the third, wind and light rain ;
on the fourth, wind and heavy rain ; on the fifth, hoar-frost and light rain ; on the sixth, hoar-frost;
on the seventh, fog and very light rain ; on the eighth,(I) much rain ; on the ninth, rain and much
wind. The aforesaid rain penetrated considerably.

November. In the first week there was slight frost during the first four days; on the fourth
and seventh days, much rain ; on the fourth and eighth, much wind. In the second week, on the
second day, there was very light rain ; on the third, light rain ; on the fourth, fifth, sixth and seventh
days, heavy rain. In the third week, on the first and second days, there was much rain and wind ; on
the third, light rain ; on the fourth and fifth, very light rain ; on the fourth or fifth, much wind ; on the
seventh, hoar-frost. In the fourth week, on the first, fourth and fifth days, there was slight frost; on
the first and sixth, rain ; on the seventh and eighth, light rain.

December, ist, slight frost. 5th, 6th and 7th, rain, and on the days previous to the 5th, light
rain occasionally. 7th, wind. In the second week, on the first day, there was wind exactly like that of
the preceding day ; on the second, frost and rain ; on the fourth, rain ; on the sixth, slight frost, and
on the seventh likewise. In the third week, on the first and second days, there was moderate frost; on
the third, fourth and fifth, slight fog ; on the fourth and fifth, light rain, but heavier on the fifth than
on the fourth ; on the sixth and seventh, light rain with much wind. In the fourth week, on the sixth
day, there was rain ; on the eighth, ninth and tenth, much hoar-frost, thick fog, and moderate frost.

It is to be noted that this winter does not seem to have been considered by any of that time to
have been so snowy as the winter immediately preceding: viz., in the year of Christ ending in 1339.

It is also to be noted that in this year of Christ, 1340, there was not much cold after the autumnal
equinox, except on the days on which there was frost, when there was moderate cold. And it is also
to be noted that from that equinox until the end of the year the wind was for the most part South-West.

A.D. 1341.

January. In the first week, on the first and third days, there was slight frost; on the second,
light rain ; on the fifth and sixth, extremely light rain. In the second week, on the first day, there was
rain with much wind ; on the third, much rain : on the third and fourth, strong wind ; on the fifth and
sixth, slight frost ; on the fifth, light snow ; on the seventh, much wind. In the third week, on the first
day, there was slight frost and heavy rain ; on the second, light rain ; on the third, much rain ; on the
fourth, rain with rather strong wind, and, in the last quarter of the day, thunder was twice heard and
lightning was many times seen, and the flashes followed in succession until the end of the first quarter
of the following night; on the fifth day, spring-like serenity; on the sixth, slight frost; on the seventh,
heavy rain. In the fourth week, on the first and fifth days, there was spring-like serenity ; on the
sixth, slight frost, but more severe than the previous frost ; on the third and fourth, heavy rain ; on
the sixth, rain; on the seventh and remaining days, very strong wind, with spring-like serenity;
on the eighth and tenth, light rain.

February. In the first week, on the first and second days, there was heavy rain ; on the third,
heavy rain, with snow and strong wind ; on the fourth, fifth and sixth, frost; on the sixth, heavy rain.
In the second week, on the first and fourth days, there was slight frost ; on the fourth, sixth and
seventh, rain; on the sixth and seventh, fog. In the third week, on the first day, there was light
rain ; on the second, less rain than on the first; on the seventh, light wind. In the fourth week, on
the_ first day there was light rain ; on the fifth, slight frost and light rain ; on the remaining days,
spring-like clearness, with light wind and extremely light rain occasionally.

March. The first week was as warm as spring. The second week was as warm as spring for
three days; on the fourth day there was light rain mixed with a little snow.

i.e., the ist day of the 5th week, and similarly for many other cases on this page.