About 13.
June, July and August is 13 weeks and 1 day.
There are 17 weeks and 3 days between September 1 and January 1.
Between January 1, 2009 and September 20, 2009 there are 34 weeks and 5 days.
In the UK, summer typically spans from June 1 to August 31, encompassing three months. This results in approximately 13 weeks of summer. However, the meteorological definition may differ from the astronomical definition, which considers summer to begin around June 21 and end around September 22, still resulting in roughly the same duration of about 13 weeks.
About 13.
5000000000000000
June, July and August is 13 weeks and 1 day.
21.6 weeks
There are a total of 22 weeks from January 1, 2010, to June 11, 2010.
There are 17 weeks and 3 days between September 1 and January 1.
26 weeks and 1 day.
A little over 21 weeks between January 1 2011 and June 1 2011.
74 weeks between June 1 2009 until November 1 2010.
13 weeks.
21 weeks (rounded down).
44 weeks and 5 days!