It's not my imagination.
With all the fun things weather sites can do, I have had a new source of frustration over the past few years: watching the radar tell me that rain is coming in 30-90 minutes, only to have it somehow pass us by. This is IMPOSSIBLE! How can it rain in Bedford and rain in Dunbarton, but the clouds scatter and drop nothing on us AGAIN? Because I work in Concord, and note that it sometimes misses there as well, going above and below, I have suspected, and grudgingly conceded, that they might have it almost as bad.
The clouds generally come from W or WSW, so what is happening in Keene is often a moderately good indicator of what will be happening in Goffstown in an hour. Albany, NY is about two hours ahead. (Funny how it is much more than twice as far as Keene culturally, with two state borders in between.) We are currently in a drought, so I am watching the weather anxiously and a bit obsessively the last few days. We had 20 minutes of light rain yesterday, but the "heavy thunderstorms" that have been expected have consistently parted about fifty miles to the west and gone to the north of us and south of us. AGAIN! Just like every year, it seems.
In the more rational parts of my brain I recognise that this is just my impression. It can't really be the case that Nashua and Laconia get significantly more rain than Manchester and Concord. It's just my bitter cynicism, aided by the confirmation bias of remembering those times when we had no rain, forgetting the downpours that drenched us and missed our neighbors. Yet in my frustration, today I went looking for average precipitation of places in NH.
I was right. Goffstown is in a narrow band of diminished precipitation. Twenty miles south and twenty miles north both get significantly more precipitation. Also, because of the increased rainfall near the coast, that dry band I live in gradually moistens starting about 20 miles east as well. There is an even drier band Above The Notch (Usually Franconia, but also Pinkham) extending up into Quebec, but from Mount Washington to Nashua, there is a 30-mile swath of lower moisture, and I both live and work in it. Mount Washington has twice the precipitation everywhere else, but starting from the north, this is the yearly precipitation
Plymouth 44.68 in
Laconia 44.15 in
Concord 40.61 in
Goffstown is between the two, more on the Manchester side
Nashua 47.97 in
Just across the border in Mass, it's similar to Nashua - which is pretty much part of Massachusetts these days anyway. Worcester 47, Lowell 48.
As I was writing this, another storm dissipated around us, not a drop, and the projected storm for the evening has already disappeared. AGAIN.
Additional note: Different sites give different numbers for annual rainfall - I don't know why, just different methods, I suppose - but all of them track comparably.