Clothing help

Like Oregon weather in April. Not serious cold but could be damp and cool. Or not, no predicting weather this far out.

I would pack some light gloves (and maybe a light knit hat if you usually wear one). We went in 2017, arriving the 2nd week of April. Arrival day was beautiful t-shirt weather, but then it turned cool. I usually had 3 layers on - tshirt, microfleece pullover and my spring jacket (a heavier jacket would have been better, but by the time we got to Paris a few weeks later, a heavier jacket would have been overkill). But I was wishing I had brought some gloves, and it wasn't the right time of year to find any cheap ones in a store, since in April, stores are mostly selling summer stuff. For footwear, I just wore my usual Blundstones, which are good for rain or shine.

Just take a waterproof (not water resistant) rain shell and a good quality fleece jacket/pullover and your good to go. Layer the Rainshell over the fleece and your warm down to 40 degrees, my favorite fleece are those made by Patagonia or Columbia, and I have had good luck with the Patagonia and Marmot rainshell's. These brands are expensive so watch the web for sales, I can usually get them for 25%-50% off if I'm patient.

It's unlikely to be very cold by the thermometer (50 degrees Fahrenheit), but it will feel much colder than the thermometer indicates, due to the very high humidity. Therefore, I found that wool was too hot, but if I wasn't wearing lots of cotton or fleece layers, I froze. I also needed gloves and a scarf.

If you're used to a "maritime climate," you'll find it easy to dress for. If you're not (like I wasn't), it's difficult. Down will be too hot, the way my cashmere sweater was.

we were in AMS the same time last year - everything from cool, windy and rainy to very warm wishing we had shorts :-)
Take a packable jacket with thinsulate or another type of product. You can also carry a light packable rain jacket. Both were hip length and worked just fine.
Consider dressing in layers; skip the down coat or any other jacket with bulk - takes up too much room. Both of my jackets came with a small pouch for packing that I carried in a backpack.
Being an over-thinker, I laid out heavier and lighter clothes.
Check the weather forecast daily starting about a week before you leave to get an idea of the 10-dqay forecast (weather.com or whatever suits your need). This will help you to pack more efficiently for the weather.

I think it also depends on how cold-tolerant you are. Your location is not indicated so if you are from S. Florida you might need more layers than I would take being used to the colder climate of North Idaho.

I agree with a waterPROOF jacket with a hood as your outer layer. I also agree with glove liners. I use Smartwool brand glove liners. They are a little water-resistant which is helpful. Last year my Smartwool gloves were too ragged to take to Scotland in June so I got another brand (Rab) and they were awful. They seemed to be water absorbent, lol. I DID use them in Scotland in Mid-June on a rainy, windy day.

I'd go with the suggested light-weight fleece and a couple of long sleeve shirts if you are not cold tolerant. You'll also need to hedge your bets with a few SS shirts as well.

I'd consider taking a lighter weight puffy vest if you are very cold natured.

Now is a good time to purchase any kind of outerwear that you might need. Lots of sales going on. Sign up for emails from Land's End and you'll get a lot of codes for big percentages off.